- Buyers Guide
Military Microwaves Supplement
Recent Advances in Radar Technology
Using Calibration to Optimize Performance in Crucial Measurements
Aluminum Nitride Leaded Terminations
These AlN packages directly replace existing BeO packages with comparable data in the areas of RF performance, power dissipation, adhesion of metal and resistive films, superior thermal performance, low dielectric constant and electrical resistivity. The terminations feature SWR of 1.25 (max) and power ratings ranging from 10 to 250 W and cover the DC to 3 GHz frequency range.
Barry Industries Inc., Attleboro, MA (508) 226-3350.
Circle No. 215
Two-way Wilkinson Power Divider
The model 151-011-002 two-way Wilkinson power divider operates over a broad frequency range of 800 to 3500 MHz with 20 dB (min) port-to-port isolation. It offers ±0.3 dB power division asymmetry, SWR of 1.4 (max), insertion loss of 0.7 dB and input power rating is 5 W CW. Standard connectors are SMA and other configurations including four-way, six-way and eight-way are available.
BroadWave Technologies Inc., Franklin, IN (317) 346-6101.
Circle No. 249
Solid-state Switch Modules
PowerMod™ solid-state switch modules are available in 3 kV modules which can be connected in series up to 200 kV, feature variable pulse widths from < 1 µs to DC, and can drive 5000 A peak. Providing a life expectancy in the billions of pulses, these modular switches are a drop-in replacement for thyratrons/PFNs and crowbars. Featuring 300 ns typical rise time and a flat top pulse, without overshoot or ringing, PowerMod™ solid-state switches can be used as hard switches or to drive pulse transformers. Price: from $7500.
Diversified Technologies Inc., Bedford, MA (781) 275-9444.
Circle No. 216
The SloWave™ delay line is available in frequency ranges from 800 MHz to 2.7 GHz and in delay times from 3 to 20 ns. Custom delays and frequencies are also available. This product offers numerous advantages over alternative technologies, including two surface-mount packaging options (ball-grid and J-lead), an orientation independent footprint, small physical outline, excellent temperature stability (< 2 ppm/°C), low insertion loss (< 0.3 dB/ns), and less than 0.5° p-p phase ripple. This delay line is ideal for applications in feed forward amplifier designs, ECM systems, microwave altimeters, radar systems and cellular base station applications.
EMC Technology, Cherry Hill, NJ (856) 429-7800.
Circle No. 217
RF Front End Assembly
The model WSA-00115 integrated RF front end (RFFE) assembly is comprised of three as- semblies, each dedicated for alpha, beta and gamma sectors of a typical three-sectored cell site. Each assembly is comprised of dual transmit and receive paths through two separate duplexers, each duplexer consisting of SWR monitoring through high directivity dual directional couplers/detectors, RF transmit and receive sample ports and low noise amplifiers with two-way splitters. SWR and power status is provided in two forms, first with front panel LEDs, and second with rear panel alarm lines. A DC voltage is also provided on the rear panel connector reflective of instantaneous SWR at the antenna port connector.
K&L Microwave, a Dover company, Salisbury, MD (410) 749-2424.
Circle No. 218
The DBTC directional couplers simplify users' 5 to 2000 MHz designing and manufacturing because termination and capacitors are built-in so there are no external parts to connect. This low cost series includes a total of nine 50 to 75 Ω models with extremely flat, precision 9 to 20 dB coupling. Size: 0.15" x 0.15". Price: from $1.99 each (25).
Mini-Circuits, Brooklyn, NY (718) 934-4500.
Circle No. 219
Broadband Microwave Chip Capacitor, Inductor and Resistor Models
Models for surface-mount inductors, resistors and capacitors spanning DC to 10 GHz are available for components from several vendors and for a wide range of nominal parts values and sizes. The substrate-dependent models incorporate adjacent ground effects, and the parameters scale with the substrate thickness and dielectric constant. The models are equivalent circuit topologies with effective series resistance being determined with precision measurement techniques. Substrate-dependent interconnect models are also available to ensure simulation accuracy in a variety of component configurations.
Modelithics Inc., Temple Terrace, FL (813) 866-6335.
Circle No. 220
The MT Series DC-to-DC converters offers power ratings of 50, 100 and 150 W. These units are ideal for board mounting and distributed power systems in telecom applications. The converters are pin-for-pin and mounting compatible with Tyco FC and FW full-brick converters. Other features include over-temperature thermal shutdown and over-voltage protection for more reliable power system operation, a "power good" signal option and positive or negative logic shutdown for implementing remote on/off control. They are also available with a broader range of input options, adding 150 and 300 V capacity to the standard 24 and 48 V. The MT series converters can be obtained with output ratings of 3, 5, 12, 15, 24 and 28 V DC. All units employ a fixed frequency topology operating at 375 kHz and achieve efficiency of up to 90 percent. Total isolation of input, output and metal cover is provided for exceptionally rugged operation. Price: $127 (100).
Powercube, a Natel company, Chatsworth, CA (818) 734-6500.
Circle No. 250
The model 2A7NDY isolator features excellent loss performance for SATCOM applications. It has low insertion loss of less than 0.15 dB (typ) operating between 7.2 and 7.8 GHz. The maximum SWR is 1.15 and the typical isolation is 30 dB over the -40° to +85°C range. The present model can handle 2 W of reverse power but can be designed to handle up to 50 W.
Renaissance Electronics Corp., Harvard, MA (978) 772-7774.
Circle No. 221
Surface-mount Power Dividers/Combiners
This series of SYNSTRIP® surface-mount, two-way, three-way and four-way in-phase power dividers/combiners are ideally suited for a wide range of wireless applications, including GSM, PCS/DCS, TDMA, CDMA, WCDMA, W-LAN, UMTS, Bluetooth and 3G systems covering the frequency band of 800 to 2800 MHz. Features like excellent amplitude and phase tracking, high isolation, low insertion loss, low SWR of these units combined with their high power handling capability (up to 10 W into load SWR of 1.2) in the optimized bandwidth make it easier for a wireless system designer to achieve high performance over a wide range of operating temperature (-55° to +85°C). The dividers/combiners are available in tape and reel for large volume requirement. Size: 0.50" x 0.35" x 0.07".
Synergy Microwave Corp., Paterson, NJ (973) 881-8800.
Circle No. 222
Coaxial Phase Adjustors
The 5050 Series phase adjustor provides continually variable phase shift over the frequency bands of DC to 2, DC to 12 and DC to 18 GHz. The broadband DC to 18 GHz models offer a SWR of 1.35, a phase shift of 43°/GHz and an insertion loss of < 1 dB at 18 GHz. This unit is terminated with SMA stainless steel connectors and available with other popular connectors.
Tensolite, St. Augustine, FL (800) 458-9960 ext. 225.
Circle No. 223
This surface-mount feedthru, called a Bell Pin, has been developed to work with lightweight aluminum or brass housings, easily mounting to the bottom of the package creating true surface-mountable parts with increased performance. Rated with an SWR of less than 1.5 up to 15 GHz and offering true 50 Ω performance, this technique is the ideal solution to costly, bulky Kovar packaging problems. The Bell Pin SMT feedthru is made with a gold-plated Kovar base and center conductor fired in place with low loss corning glass.
Thunderline Z, Hampstead, NH (603) 329-4050.
Circle No. 224
WLAN Ceramic Filter
The model 311-00036 ceramic filter is designed to be used in wireless 802.11 LAN applications including WI-FI, NIC and AP. With a center frequency at 5800 MHz, this low profile filter offers bandwidth at ±50 MHz, insertion loss at 3 dB (max), return loss at 10 dB (min) and ripple at 1 dB (max). This rugged, mono-block, three-pole filter is available in surface-mount tape and reel. Custom designs are available in the 802.11 frequency band. Size: 14 x 3 x 3 mm.
TRAK Microwave, a TRAK Communications company, Tampa, FL (813) 901-7300.
Circle No. 225
Resonator Design Kit
This revised coaxial resonator design kit contains 150 resonators, giving a variety of mechanical profiles (2, 4 and 6 mm) in order to assist the engineer in design. Each of the five available kits specifically addresses existing frequency bands from 300 MHz to 5 GHz. Whether used for VCO or filter applications, the kits offer engineers the frequency and mechanical options necessary.
Trans-Tech Inc., a subsidiary of Alpha Industries, Adamstown, MD (301) 695-9400.
Circle No. 226
RF Coaxial Connectors
The SC line of high power RF coaxial connectors replaces the C series bayonet types with a secure threaded coupling in applications subject to vibration. Featuring a 5 kV version with overlapping Teflon® dielectrics for a longer electrical leakage path, these connectors can also be supplied in a 1 kV version with high temperature (165°C) Fluoroloy® H dielectrics. Designed for cables from 0.141" up to 5/8", the SC coaxial connectors meet MIL-C-39012 and MIL-STD-348 specifications and are fabricated from brass or stainless steel and can be nickel or silver plated, with BeCu center conductors which can be gold or silver plated. They are ideal for radar and antenna systems in airborne, shipboard and ground installations. Price: $24.
Tru-Connector Corp., Peabody, MA (800) 262-9878 or (978) 532-0775.
Circle No. 251
mm-Wave Power Amplifiers
The model AA026P2-A4 and AA032P1-A4 broadband millimeter-wave medium power amplifiers incorporate the patent-pending Alpha-2™ surface-mount package for significant performance and cost advantages. The robust ceramic surface-mount package provides excellent electrical performance and a high degree of environmental protection for long term reliability in mm-wave communication and sensor systems, including VSAT and broadband wireless access. The AA026P2-A4 has a frequency range of 23.5 to 26.5 GHz, flat gain performance of 16 dB and 22 dBm P1dB output power. Covering a frequency range of 29 to 32 GHz, the AA032P1-A4 has flat gain of 11 dB and high output power of 24 dBm P1dB. The design of the amplifiers eliminates the need for expensive microelectronic assembly and tuning while increasing the production yield. As a result, both amplifiers can be used as output stages or drivers in the transmit chain or LO chain in high volume applications requiring high gain and high linearity.
Alpha Industries Inc., Haverhill, MA (978) 247-7700.
Circle No. 227
The model AD8039 voltage-feedback amplifier has exceptionally low quiescent current of 1 mA (typ) even at 350 MHz. The low power consumption of the amplifier will allow designers to minimize battery and cooling requirements, which, in turn, will save cost and allow higher density boards. Lower operating temperatures can also be expected to increase system reliability and product lifetime. The AD8039 features a -3 dB bandwidth of 350 MHz, a slew rate of 425 V per microsecond and low offset voltage of 5 mV (max). Given its wide voltage range, this amplifier can work in a variety of applications where power and space are at a premium, including dense systems such as automatic test equipment, medical instrumentation, portable equipment, PC boards and wireless communication. The AD8039 is rated to work over the industrial temperature range of -40° to +85°C.
Analog Devices Inc., Norwood, MA (800) 262-5643.
Circle No. 252
Linear 150 W Broadband Power Amplifier
The model AR88258-150 high power GaAs FET power amplifier provides a minimum of 150 W (1 dB compression point) over the full 800 to 2500 MHz frequency band. This combination of bandwidth and linear power makes this amplifier an ideal instrument for linearity testing. The AR88258-150 operates from 220 V AC, 50/60 Hz. An optimal IEEE-488 control/monitor interface is also available. Size: 17.50" x 19.00" x 26.25".
Comtech PST, Melville, NY (631) 777-8900.
Circle No. 253
Fiber-optic Transimpedance Amplifier
This line of fiber-optic transimpendace amplifiers (TIA) is designed for use in 10/12.5G telecom and 10 Gb Ethernet transceiver products. The model SFT-0100 is a high performance, low noise InGaP TIA ideally suited to 10/12.5G telecom applications with a transimpedance of > 220 Ω, 3 dB bandwidth > 11.5 GHz, optical overload of 2.5 mA peak-to-peak and optical sensitivity of better than -18.5 dBm. The model SFT-5100 TIA utilizes SiGe technology and produces a transimpedance of > 2200 Ω and a 3 dB bandwidth > 8.5 GHz. Price: $9.95 (100,000).
Sirenza Microdevices Inc., Sunnyvale, CA (408) 616-5400.
Circle No. 231
HBT Driver Amplifiers
The model HMC413QS16G and HMC413QS16G heterojunction-bipolar-transistor (HBT) medium power MMIC amplifiers operate between 1.7 to 2.8 GHz with up to +27 dBm output power and +40 dBm OIP3 from a single supply voltage. The HMC413QS16G is ideal for use as a linear PA driver in cellular, PCS or 3G base station and repeater transmitters. The HMC414MS8G is well suited for data intensive driver applications such as W-CDMA, 802.11b WLAN and MMDS. The HMC413QS16G provides 22 dB of gain and +29.5 dBm of saturated power at 42 percent PAE from a 5.0 V supply over 1.7 to 2.3 GHz. The HMC414MS8G provides 20 dB of gain and +30 dBm of saturated power at 32 percent PAE from a 5.0 V supply over 2.2 to 2.8 GHz. In both cases, the amplifiers can operate using a 3.6 V supply. Each product has a power down control input that can be used for efficient control of DC current consumption and RF output power.
Hittite Microwave Corp., Chelmsford, MA (978) 250-3343.
Circle No. 228
The model ADA0306 amplifier/doubler/amplifier doubles a 3 to 6 GHz input to 6 to 12 GHz. A +5 to +8 dBm input is converted to a typical output of +14 dBm. The ADA0306 is designed for the communications market and is available in both connectorized and carrier outlines. It has typical fundamental and third harmonic suppressions of 20 dBc. The supply requirement is +5 V at 100 mA.
Marki Microwave Inc., Morgan Hill, CA (408) 778-4200.
Circle No. 229
High Power Linear Microwave Amplifiers
This family of high power linear microwave amplifiers covers 0.8 to 4.2 GHz and is ideally suited for applications such as RF device testing, covering all the major bands including GSM, PCS, WLL and IMT-2000. In addition, these amplifiers are well-suited for laboratory test and measurement purposes. The higher power models are also well-suited for RF immunity testing.
OPHIR RF Inc., Los Angeles, CA (310) 306-5556.
Circle No. 230
High Power, High Dynamic Range Amplifier
The model AH201 high linearity, 1 W GaAs MMIC amplifier operates from a single supplyvoltage and is internallymatched to make it ideal for both narrow band and broadband applications. The amplifier can be used in the GSM, CDMA, TDMA, UMTS and CATV applications to produce +47 dBm of IP3 performance. Exceptional thermal design is achieved through the LPCC surface-mount package to maintain MTBF values of over 100 years at mounting temperatures of up to +85°C. A feature of the AH201 is +30 dBm of compressed power at P1dB. Under complex modulation, the amplifier's high linearity performance allows it to produce usable signals at +22 dBm of output power while meeting stringent W-CDMA specifications. Size: 6 x 6 mm.
WJ Communications Inc., San Jose, CA (800) 951-4401.
Circle No. 232
The ClearLink 2400 embedded antenna is an ideal solution for Bluetooth and 802.11 applications, and is especially well suited for applications requiring small size and low cost, while maintaining excellent electrical performance. ClearLink antennas do not require cables or connectors, and can be directly mounted on circuit boards and modules using standard surface-mount assembly processes, with no offset from the groundplane. The unique design also simplifies system design and manufacturing by providing improved electrical isolation from other nearby components. The antenna covers the 2400 to 2480 MHz frequency range with < 2.0 SWR and 10 W CW power handling. Size: 9.0 x 13.0 x 2.2 mm. Weight: 0.12 g.
e-tenna Corp., Laurel, MD (240) 456-4100.
Circle No. 233
DRWiN™ WLAN Antenna
This DRWiN™ WLAN is the first electronically scanning wireless LAN antenna for indoor subscriber applications. It is a low cost solution that enables a variety of high speed data applications in virtually any scenario where wireless networks are established. Targeted for residential users, wireless office solutions, factory floors and most any workplace, the antenna is easily transportable and offers a fully automated, plug-and-play operation. The antenna is also compatible with all 802.11b devices with external RF connectors.
Paratek Microwave Inc., Columbia, MD (443) 259-0140.
Circle No. 235
Dual Polarized Horn Antennas
The model DP240 and DP241 dual polarized horns operate from 2 to 18 GHz and 18 to 40 GHz, respectively. These high performance horn antennas offer high isolation with low phase and amplitude imbalance between ports. The antennas maintain low SWR and the precision manufacturing method ensures very low cross-polarization. Typical applications include EMC, antenna and radar cross-section measurement and surveillance systems.
Flann Microwave Ltd., Bodmin, UK +44 1208 777777.
Circle No. 234
Radar Simulator Antenna
The model 0077-810 radar simulator antenna advances state-of-the-art with its ultra-wide frequency coverage of 500 MHz to 8 GHz. It is an offset-fed eight-foot parabolic reflector with a high power feed rated at 1 kW CW. The antenna is equipped with a remotely-controlled polarization rotator. Antenna gain ranges from 19.0 to 41.8 dBi, the minimum bandwidth is 1.3° and the front-to-back ratio is better than 20 dB.
Seavey Engineering Associates Inc., Pembroke, MA (781) 829-4740.
Circle No. 236
High Power GaAs FET
The model AM 072 MX-CB is part of a series of GaAs MESFETs. This device has a total gate width of 7.2 mm and is offered in a specially designed package with two screw holes on the flange to be mounted on a metal heatsink. The flange at the bottom of the package serves simultaneously as DC ground, RF ground and thermal path. Typical performance specifications at 3.5 GHz (TA=25°C) when Vds =7 V and Ids =0.5 Idss , P1dB=34 dBm, efficiency at P1dB=46 percent, gain (small signal) of 11 dB, IP3=49 dBm. It is well suited for wireless communications applications including WLAN, MMDS/MDS, PCS base stations, repeaters and Hyperlan.
AMCOM Communications, Clarksburg, MD (301) 353-8400.
Circle No. 254
The model LP801 10 W, 28 V plastic LDMOS FET is designed to operate from DC to 500 MHz plus. Low cost plastic molding significantly reduces the price and the output rating at 500 MHz is 10 W. The minimum gain is 13 dB and the devices are suitable for operation in communications and laser drivers.
Polyfet RF Devices, Camarillo, CA (805) 484-4210.
Circle No. 255
Liquid Crystalline Polymer Materials
The first of the company's new ZYVEX™ liquid crystalline polymer circuit materials, ZYVEX TeraClad™ is a single-clad laminate, developed primarily for flexible circuit applications. ZYVEX laminates are designed to meet today's industry requirements for low/stable dielectric constant, low/stable dielectric loss, extremely low moisture absorption, high chemical resistance, matched in-plane CTE and excellent dimensional stability. These attributes bring high density integration, high reliability, and efficient processing and handling when compared to polyimide materials. Benefits include excellent dimensional stability, reduced stress, lays flat, reduced variations in electrical performance and it allows thinner layers.
Rogers Corp., Rogers, CT (860) 774-9605.
Circle No. 237
Full Spectral-domain System Simulator
GENESYS 8.1 and SPECTRASYS are the industry's first full spectral-domain system simulator capable of analyzing signal sneak paths, full channel bandwidth and system interactions not typically seen before test measurements. SPECTRASYS allows engineers to specify entire spectrums including measured data for frequency sources such as oscillators and antennas. It eliminates design turns due to unwanted spectrums by automatically predicting full node spectrums and by exposing undesired spurs and inter-modulation levels before system integration. SPECTRASYS is integrated with GENESYS to facilitate design team collaboration and analysis throughout the design cycle.
Eagleware, Norcross, GA (678) 291-0995.
Circle No. 238
Satellite Radio Signal Generator
The model CS2010SDARS satellite radio signal generator is an "all-in-one" solution for production testing of satellite delivered audio radio (SDARS)-capable radios. By providing the two satellite channels and the terrestrial repeater channel simultaneously, a single unit realistically and cost-effectively simulates a complete SDARS network connection. It features up to 70 dB of independent signal-to-noise ratio for each channel, 30 MHz of multi-carrier bandwidth for "full-band" realism and a deep 11.5 seconds of non-repetitive signal playback. The CS2010SDARS can simulate adjacent channel signals, potential in-band and out-of-band interferers and, using built-in signal import functions, replay actual, field-recorded, "drive-test" signals. This allows cost-effective, realistic test and validation of radios at manufacturing sites anywhere in the world, even beyond the satellites' coverage.
Celerity Systems Inc., a division of L-3 Communications, Cupertino, CA (408) 873-1001.
Circle No. 239
Narrowband Low Noise Oscillators
The FXD series of narrowband low noise oscillators covers frequencies from 2 to 9 GHz and is ideally suited for use as a DRO replacement. The advantages of these oscillators include smaller size, lower power consumption, better microphonic noise levels, and higher resistance to vibration when compared to typical DROs. Most units are designed to have tuning ranges of 1 to 4 percent to facilitate use in a PLL or frequency synthesizer. These oscillators offer superb stability and can be designed to achieve a total frequency error of less than ±3 MHz, including effects of aging, pushing, pulling and temperature.
Spinnaker Microwave Inc., Santa Clara, CA (408) 732-9828.
Circle No. 240
The model VC-490 miniature precision SMD-voltage controlled oscillators (VCXO) are designed using high frequency fundamental crystal technology for use in telecommunication applications. Available at frequencies up to 170 MHz, the VC-490 provides the same performance specifications of larger sized precision oscillators but with the smaller size and footprint of commercial grade VCXOs. The unit is packaged as an FR-3-based SMD device with a supply voltage of 3.3 V DC. Temperature ranges are -20° to +70°C and -40° to +85°C with tight temperature stability. The oscillators also have a pulling range of more than 100 ppm with linearity of less than 10 percent for enhanced PLL performance. Size: 13.8 x 9.1 x 5.5 mm.
Vectron International (VI), Norwalk, CT (888) 832-8766.
Circle No. 241
YIG Oscillator Demonstration Kit
This demonstration kit is designed for the company's phase hit free YIG oscillators. The kit consists of an interface card and the YIG oscillator. The interface card allows digital radio designers to easily "plug and play" the YIG into their configuration. The company offers YIG oscillators from 5.8 to 12.0 GHz with 2 GHz tuning range. The oscillators operate phase hit free within their tuning range.
VertiCom Inc., Santa Rosa, CA (707) 570-3313.
Circle No. 242
Ultra Low Noise VCO
The model SMV1885L surface-mount low profile package voltage controlled oscillator (VCO) is designed for the most demanding digital microwave radios. It will generate frequencies between 1870 and 1890 MHz within a control voltage range of 0.5 to 2.5 V DC, allowing the error voltage to be taken directly from the IC's charge pump circuitry. This device conserves energy by drawing only 14 mA of current from a 3 V DC supply and saves PCB space through its subminiature size. The SMV1885L exhibits spectral purity of -90 dBc/Hz (typ) at 10 kHz from the carrier and is specified to operate over the extended commercial temperature range of -40° to +85°C. In addition this device provides the end user 5±2 dBm of output power into a 50 Ω load and suppresses the second harmonic to better than -10 dBc. Size: 0.30" x 0.30" x 0.30" x 0.08".
Z-Communications Inc., San Diego, CA (858) 621-2700.
Circle No. 256
The model UDC-233233-FR2 compact, high performance transceiver is designed for use in point-to-point microwave radios used in LMDS cellular backhaul and digital enterprise microwave links. Built using the company's phase noise DROs, the transceiver has a fundamental operating frequency of 11.75 GHz with an inherent phase noise of -95 dBc at a 10 kHz offset and -121.5 dBc at 100 kHz offset. This insures improved bit error rate performance for microwave radios employing 64 QAM and higher modulation schemes. The transceiver contains both up and down converters designed to operate in the K- and Ka-bands (21 to 29 GHz) in a compact package. The receiver features 30 dB (min) of gain with a typical noise figure of less than 3 dB at room temperature. The transmitter output power is +17 dBm. The unit operates off a single +12 V DC supply, consuming only 14 W of power. Size: 2.20" x 3.00" x 0.61".
Lucix Corp., Camarillo, CA (805) 987-6645.
Circle No. 244
The model MS-2002 WaveCor DDS module is a CMOS DDS device that provides superior frequency resolution and unmatched broadband spurious and phase noise performance. This model covers a frequency of 2.0 to 22.5 MHz with a clock frequency of 100 MHz. Typical spurious performance is -80 dBc. Critical synthesis specifications include switching speed of 480 ns and the ability to operate in either CW or chirp mode. The device offers a 64-bit frequency/phase accumulator structure providing high tuning resolution of frequency, delta frequency and phase offset. The company's proprietary DDS technique dramatically reduces spurious signals by designing out impurities typically caused by NCO/DAC phase and amplitude quantization. Size: 4.0" ´ 5.0" ´ 0.6".
ITT Industries, Microwave Systems Advanced Engineering and Sciences, Lowell, MA (978) 441-0200.
Circle No. 243
Linear Integrated Transceiver Modules
This line of linear integrated transceiver modules is geared toward digital microwave radios utilizing 16 to 128 QAM modulation schemes and passing data through 155 Mbps. These units consist of the Tx upconverter, intermediate LO multiplier and distribution network, and all DC conditioning/distribution. The transmitter section includes IF pre-amplification and filtering, upconverter mixer, image and LO filtering, variable-gain driver amplifiers, power amplification, and an output power detector. The receiver chain includes the LNA, variable RF attenuator for increased dynamic range performance, downcoverter mixer with image filtering, and 1st IP amplification. Common platforms are used to insure high bill of materials similarity from 18 to 38 GHz.
Signal Technology Corp. - Wireless Group, Beverly, MA (978) 524-7468.
Circle No. 245
Portable Timing Reference
The RubiSource® T&M portable timing reference is based on the company's rubidium oscillator technology for universal use in test and measurement applications. A variety of coherent standard frequencies are provided. The unit's 1 PPS output signal provides exact timing information and this output can be synchronized to an external 1 PPS input signal. The reliable output signals are based on the highly accurate and stable rubidium oscillator inside the unit. The rubidium's fast warmup eliminates the need for backup batteries. The RubiSource T&M can be locked to an external primary source such as a GPS receiver or Cesium standard for automatic frequency calibration of the rubidium oscillator and/or enhancing the intrinsic rubidium accuracy to near-cesium quality.
Datum-Timing, Test & Measurement, Beverly, MA (978) 232-1422.
Circle No. 246
Planar Near-field Measurement Systems
The MI-3630 family of planar near-field measurement systems is designed for test and measurement applications in the wireless industry. The products operate over the 400 MHz to 18 GHz frequency range. The measurement system is also available with an optional vector network analyzer and computer desk.
MI Technologies, Duluth, GA (800) 848-7921.
Circle No. 247
Thermal Enclosure/ATE Interface
The ThermoFixture® thermal enclosure and turnkey ATE interface is designed and developed for a wide range of applications from component, module and PCB testing to characterizing high performance devices and assemblies at temperature. The unique advantage of the ThermoFixture is the turnkey ATE interface which enables the user to perform moisture-free testing of high frequency, high power and sensitive DUTs conveniently at the tester. Including all mechanical and electrical fixturing, the tester-specific interface uses impedance matched connections to assure clear and accurate test signals between the tester and the DUT. Simultaneously, the enclosure provides patented DUT temperature control at the device case in a dry, noise-free, ESD-free test environment.
Temptronic, an InTEST company, Sharon, MA (781) 688-2300.
Circle No. 248
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