- Buyers Guide
Recent Advances in Radar Technology
Using Calibration to Optimize Performance in Crucial Measurements
0.5 - 3 GHz Miniature Digital Attenuators
The models AA105-86 and AA106-86 single positive control GaAs IC FET digital attenuators are four and five bit, respectively. The AA105-86 offers high attenuation accuracy at 1 dB steps to 15 dB; the AA106-86 features high attenuation accuracy at 0.5 dB steps to 15.5 dB. Both units feature low DC power consumption and are designed in a miniature low cost MSOP-10 plastic package. Typical applications include cellular radio, wireless data and wireless local loop gain level control circuits. Price: $4.40 (10,000).
(800) 290-7200, ext. 306 or (508) 894-1904.
The model JX510 mini Xinger® surface-mount, low profile, 10 dB coupler for the 1.7 to 2 GHz band has been designed for UMTS, wideband CDMA and IMT-2000 applications. It features directivity of 20 dB (min) and insertion loss of 0.2 dB (max). The coupler has a peak-to-peak frequency sensitivity of +/-0.1 dB, and SWR is better than 1.18. Maximum average power is 70 W. The JX510 is manufactured using materials with x and y thermal expansion coefficients compatible with many common substrates, including FR4, G-10 and polyimide. Size: 0.56" x 0.2" x 0.075".
Anaren Microwave Inc.,
E. Syracuse, NY
The FFI series 5 and 10 W convection-cooled attenuators use an interseries adapter kit to mate with a variety of RF connectors. The units operate over the frequency range of DC to 4 GHz, which allows usage in cellular, data, ISM, land mobile, paging, PCS or SMR/ESMR applications. The attenuators are 50 W devices that operate in any position. The 5 W model is rated for 5 W at 40°C ambient temperature and 6 W at 25°C. The 10 W model's power rating is 10 W at 40°C or 12 W at 25°C. Standard attenuation values for the FFI series are 1, 2, 3, 6, 10, 20 and 30 dB. Maximum SWR for both versions is 1.10 at DC to 1 GHz and 1.25 at 1 to 4 GHz. These values may be derated by the company's interseries adapters or customer-supplied adapters. Custom values are available on quantity purchases.
Bird Component Products Inc.,
Integrated Isolator Package
This integrated isolator package performs the work of both isolator and coupler and offers 0.4 dB (max) insertion loss and 50 dB isolation over the 925 to 960 MHz frequency range. It also incorporates two forward monitor ports and a fully functioning reverse coupler with 30 dB directivity to provide highly accurate system monitoring capability. The high power termination is supplied with a cable to ensure maximum heat dissipation away from the isolator assembly to enhance long-term reliability of the system. The isolator is magnetically shielded to allow close assembly of multiple devices.
Densitron Microwave Ltd.,
Southend-on-Sea, Essex, UK
44 (0) 1702-463440.
Miniature Magnetic Coaxial Transfer Switches
The 611 series low cost, miniature, magnetic coaxial transfer switches operate from DC to 18 GHz. Standard with SMA connectors, the 50 W impedance switches with actuating voltage of 12 or 28 V DC are intended for test applications. The units can handle up to 100 W CW and offer up to five million operations without performance degradation. Insertion loss is 0.5 dB (max) and isolation is 60 dB (min). Operating voltage is 12 and 28 V DC and switching time is 15 ms.
Dow-Key Microwave Corp.,
38 GHz Diplexer
This diplexer provides low insertion loss with high harmonic rejection. The passbands can be tuned in the range of 37 to 39.5 GHz with a bandwidth of 640 MHz and a transmit to receive spacing of 1260 MHz. Harmonic rejection exceeds 40 dB. The operating temperature range is from -30° to +70°C. Size: 4.13" x 1.27" in WR-28 waveguide.
Filtel Microwave Inc.,
Vaudreuil-Dorion, Quebec, Canada
High Frequency Fundamental Crystals
The models HC-45/u and HC-49/u high frequency fundamental crystals are suitable for applications like voltage-controlled crystal oscillators (VCXO) that require the ability to move frequency by a large amount. They are produced up to 50 MHz for VCXO, temperature-compensated crystal oscillator and filter applications, and reduce the number of multiplier stages in transceivers. The high frequency fundamental crystals with +/-10 ppm calibration tolerance and +/-10 ppm temperature tolerance from 0° to +50°C are available in small custom quantities. Delivery: two to three weeks.
International Crystal Manufacturing Co. Inc.,
Oklahoma City, OK
The RC1206 series thick-film resistor-capacitor chip provides an economical solution for noise filtering and snubber circuits in telecommunications and computer applications. The thick-film resistive element features a resistance range of 10 W to 1 kW with tolerances to 10 percent, a voltage rating of 5 V (max) and temperature coefficients of resistance (TCR) to 200 ppm/°C. The capacitive element features a capacitance range from 10 to 200 pF with tolerances to 20 percent, voltage rating of 50 V (max) and TCR of +20/-55 percent. The device's operating temperature is rated from -55° to +125°C. The surface-mount 1206 chip is compatible with automated assembly equipment and wave or reflow soldering processes. Price: 18¢ (500,000). Delivery: stock to six weeks.
International Resistive Company Inc. (IRC),
Corpus Christi, TX
(888) 472-3282 or (512) 992-7900.
Four-way Power Divider/Combiner
The model D317NS four-way power divider/combiner is designed for cellular and PCS applications. The unit operates over the 800 to 2000 MHz frequency range with typical band isolations of 30 dB between ports. It is amplitude and phase balanced within 0.3 dB and +/-2°, respectively, and SWR is < 1.25 at any port. Input power is +/-20 dBm (max). The D317NS is supplied with stainless-steel SMA connectors in a 3.00" x 3.00" x 0.58" package. Weight: 3.5 oz. Price: $50. Delivery: stock.
(973) 887-8100, ext. 500.
The model WSD-00136 high performance compact AMPS-band duplexer is configured with a receive passband of 824 to 849 MHz and transmit passband of 869 to 894 MHz. Insertion loss and ripple within the passbands are specified at 1 dB (max) and 0.4 dB p-p (max), respectively, and passband return loss is specified at 17 dB (min), 20 dB (typ). The unit offers good passband-to-passband isolation of 85 dB (min) with antenna-to-receive rejection of 60 dB (min) from DC to 784 MHz, 85 dB (min) from 869 to 894 MHz and 50 dB (min) from 894 to 2547 MHz. Transmit-to-antenna rejection is 60 dB (min) from DC to 824 MHz, 85 dB (min) from 824 to 849 MHz and 50 dB (min) from 934 to 2682 MHz. Power handling is 45 W CW and 450 W peak instantaneous. Operating temperature range is 0° to +50°C. Size: 6.75" x 6.32" x 2.75", excluding connectors. Connectors are N-F at all ports. Delivery: six to eight weeks (ARO).
K&L Microwave Inc.,
This PCS narrowband duplexer for CDMA applications has < 0.7 dB of insertion loss across the 25 MHz bandwidth. The high Q ceramically loaded cavity duplexer is factory tunable to any of the PCS bands. The high Q transmit portion of the duplexer provides greater than 8 dB of attenuation 2.25 MHz from the band edge and greater than 60 dB of co-channel isolation. Size: 9.81" x 6.35" x 2.00".
Double- and Triple-balanced Mixers
These double- and triple-balanced mixers (along with image-reject, dual (IF) and (IQ) mixers) cover RF and LO frequencies from 500 MHz to 26.5 GHz in varying bandwidths up to 180 percent. Double-balanced IFs vary from DC to 4 GHz and triple-balanced up to 8 GHz. The mixers are designed for low conversion loss and good IP3 performance. Open carrier, pin pack, surface-mount, TO8 and coaxial packages are available.
MICA Microwave Corp.,
San Jose, CA
Ka-band Synthesized Converters
This series of Ka-band converters offers upconverters in the 27.5 to 31 GHz frequency bands and downconverters in the 17.7 to 21.2 GHz bands both for existing Ka-band satellites and satellites currently being planned. Frequency tuning is in a 125 kHz (min) step size. Both frequency and level control are available via the front-panel keypad or remote interface. Phase noise is data quality.
The model MSR-1A-30G double-balanced mixer uses two pairs of GaAs Schottky diodes configured in a star pattern. The RF and LO signals are coupled to the diodes by means of modified Marchand baluns. The IF port is DC coupled and the low parasitic inductance of the star configuration allows an IF bandwidth of 11 GHz. The mixer operates from 15 to 30 GHz with an IF as high as 11 GHz. However, the data show respectable conversion loss performance from 10 to 35 GHz. Typical applications include the high speed data satellite market as well as local multipoint distribution systems.
Merrimac Industries Inc.,
West Caldwell, NJ
24 GHz Notch Filter
The model 12682 notch filter removes unwanted frequencies with a 50 dB (min) notch depth at 24.9 GHz and a passband loss of 0.5 dB (max). Used in a transmission system passing 24.25 to 24.45 GHz, the unit has a passband return loss of 16 dB (min), operating temperature range of -10° to +60°C and humidity of 99 percent noncondensing. The unit comes with WR-42 cover flanges, but other connectors are available upon request. Length: 2.45 inches (max).
Microwave Filter Company Inc. (MFC),
East Syracuse, NY
(800) 448-1666 or (315) 438-4747.
High Ratio Isolator
The model 0086IHD high ratio isolator is designed to provide 50 dB (min) isolation at 865 to 900 MHz with 250 W forward and 65 W reverse power handling. The circuit tabs are designed to be part of the center conductor to provide maximum lead strength for the soldering process. The isolator presents a low insertion loss of 0.4 dB with a temperature range of -20° to +85°C. SWR is 1.2 on all ports. High isolation circulators/isolators in other frequency bands are available in similar packages with a maximum thickness of 0.3 inch.
Morgan Hill, CA
The CK series dual-band directional couplers are designed for base station and wireless service providers. The couplers feature main line loss below 0.1 dB and low passive intermodulation of -140 dBc. The series is available in 6, 10, 20 and 30 dB coupling values using N female connectors. Similar units are available with a variety of common connectors for frequencies up to 18 GHz. All are rated to 200 W (avg), 3 kW peak power.
Ceramic Resonators, Inductors and Elements
These ceramic resonators operate over the frequency range of 200 to 8500 MHz and come in a variety of sizes from under 2 mm to over 12 mm for larger base station applications. Various metallizations are tailored to individual requirements. These low cost, high volume resonators, inductors and custom elements find applications in VCOs, filters, high Q inductors and frequency applications. Dielectric resonator pucks are also available upon request.
PicoFarad/Val Jackson & Associates Inc.,
Scotts Valley, CA
The 7-16 DIN adapter series has been expanded to include the RFD-1640-2, a 7-16 DIN male to 7-16 DIN female straight adapter that is good for use in PCS, cellular and instrumentation applications. The 7-16 DIN connector line features PTFE insulation and silver-plated bodies and contacts, which provide high conductivity, optimal intermodulation distortion characteristics and corrosion resistance. All 7-16 DIN connectors conform to DIN 47223, IEC 169-4 and CECC 22 190 standards and are designed for use in medium to high power communication systems applications.
RF Connectors, a division of RF Industries,
San Diego, CA
(800) 233-1728 or (619) 549-6340.
8 x 8 200 W Butler Matrix
The model RFP-4339 high power 200 W 8 x 8 Butler matrix is designed for cellular and wireless applications. It operates in the 815 to 890 MHz frequency range with an amplitude balance of +65 dB and phase balance of +/-5°. Insertion loss is < 1 dB and SWR is < 1.25. Amplitude and phase balance are +/-0.65 dB and +/-5°, respectively. Operating temperature is 55° to 85°C. Size: 9.0" x 4.5" x 1.0". Delivery: stock to five weeks.
RF Power Components Inc.,
Programmable Digital Attenuator
The model P-DATT-9200 six-bit programmable digital attenuator is an integrated IC housed in a 1.0" x 1.8" x 0.475" hermetic case that offers 0.5 dB resolution. Attenuation levels are 1, 2, 4, 8, 16 and 32 dB, and the unit operates over the frequency range of 10 to 500 MHz with a switching speed of 100 ns and attenuation accuracy of +/-0.2. SWR is 1.4. The insertion loss is 3 dB and the unit handles +20 dBm of power. Custom models are available. Price: $1100 (10-24).
Signal Technology Corp.,
Miniature Chip Dual-band Diplexer
The LTF3216D-F series chip dual-band diplexer operates over the carrier frequency range from 800 to 2000 MHz and has a 1206 footprint (3.2 mm x 1.6 mm) with a low profile of only 1.0 mm. The chip dual-band diplexers have a low insertion loss of < 0.5 dB and an average minimum attenuation of 20 dB in either the high or low band. They are specifically recommended to cost-effectively separate frequency bands downstream of the antenna for optimal flexibility in dual-band RF cellular design. The units are packaged on tape and reel in 2000-piece quantities. Price: 75¢ (10,000).
Toko America Inc.,
Mt. Prospect, IL
Miniature, High Performance Flexible Cable
The 421-677 series flexible cable measures 0.088" in diameter, has a static bend radius of 0.25" (min) and is suitable for use with SMP connectors. The velocity of propagation is a high 81 percent and a quadraform shield design provides good shielding effectiveness of > 85 dB through 18 GHz.
Storm Products Co., Advanced Technology Group,
Single Directional Couplers
The models HCHP-12180, -18265 and -26540 single directional couplers operate over the frequency range of 12 to 18 GHz, 18 to 26.5 GHz and 26.5 to 40 GHz, respectively. The HCHP-12180 features directivity of 15 dB, insertion loss of 0.3 dB and power of 100 W. The HCHP-18265 features directivity of 13 dB, insertion loss of 0.5 dB and power of 80 W. The HCHP-26540 features directivity of 11 dB, insertion loss of 0.7 dB and power of 60 W. All three versions have impedance of 50 W and coupling of 20 or 30 dB (nom).
RLC Electronics Inc.,
Mount Kisco, NY
RF Coaxial Connectors
These RF coaxial connectors are variations of type C, SC, LT, LC and SQS connectors but feature enlarged center conductors and insulators to provide longer leakage paths along with step-cut back ends. Capable of withstanding up to 10,000 V peak (C and SC 4000 V), the connectors conform to MIL-C-3650 and MIL-C-39012 specifications. Applications include laser-, sputtering and process systems and medical electronics, radar and pulse equipment.
5 pF Multiturn Miniature Trimmer Capacitor
The A4 series trimmer capacitor tunes from 0.6 to 5 pF with five full turns for fine resolution. Voltage rating is 125 V DC with a high voltage option of 1000 DC working volts and 2000 DC withstanding volts. Q is over 2000 at 100 MHz with a self-resonant frequency of 1.8 GHz at 5 pF. The patented solid PTFE dielectric offers linear tuning and no chance of shorting. There are positive stops at minimum and maximum capacitance. Nonmagnetic versions for MRI and NMR are available. A desired capacitance value can be preset within +/-1 percent so that no or minimal tuning will be required by the user. Price: $1.69 (10,000). Delivery: six weeks.
High Power Attenuator
The model WA29 high power attenuator operates over the frequency range of DC to 8.5 GHz. The nominal impedance is 50 W with natural convection cooling. Unidirectional power rating is 75 W (avg) from -55° to +125°C, derated linearly to 0 W at 125°C, 5 kW peak power. Maximum SWR is 1.2 (DC to 4 GHz) and 1.3 (4 to 8.5 GHz). Size: 5.70" x 3.50" x 2.25". Weight: 24 oz. Price: $275. Delivery: 60 days (ARO).
Weinschel, Bruno Associates,
The model W9180 dual-band diplexer is designed for the 900 MHz GSM and 1.8 GHz DCS signals and eliminates the need for two tower feed cables at the base station. The diplexer covers the full DCS and GSM bands with < 0.5 dB insertion loss. Between-band isolation is > 60 dB. Return loss is > -18 dB, all ports. The power capability is > 50 W (both bands). Size: 2" x 4" x 6". Price: less than $255 (small quantities). Delivery: stock to two weeks.
Wireless Technologies Corp.,
(877) 420-7983 or (501) 750-1046.
The company offers a series of filters, which includes a surface-mount GPS diplexer. The configuration has a low loss of 0.7 dBa at the L1 and L2 passbands with channel-to-channel isolation of 30 dBa, and the unit will survive an Sn62 reflow environment. The location of the miniature input and output pads can be specified to accomodate many board configurations. Size: 1.0 x 0.5 x 0.4.
San Marcos, CA
7 kW SPDT PIN Diode Switch
The model ES0101 SPDT PIN diode switch is rated for 7 kW (peak), 35 W (average) power over the 5 to 6 GHz frequency band and operates on +5 V at 400 mA and -150 V at 5 mA. Insertion loss is < 1 dB (0.8, typ), isolation is > 40 dB and SWR is 1.5 with a switching speed of 3 ms.
Enon Microwave Inc.,
The GMT-72XX LDO series micropower, low dropout voltage regulators are specifically designed to operate in noise-prone, switch-mode enviroments and provide reliable, low cost solutions for mobile telephones, palm computers, pagers, global positioning equipment and other portable applications. The units feature a logic-enabled sleep mode that produces a sleep-state current of only 0.5 mA. Typical quiescent current is 180 mA, independent of the load. The regulators are available in adjustable and 5.0, 4.85 and 3.3 V fixed output voltage options and are offered in eight-pin SOIC and DIP packages. Price: 75¢ each (1000). Delivery: four weeks.
GMT Microelectronics Corp.,
50 W Dustcap Terminations
The model 3200 ultra-low cost 50 W dustcap terminations are designed for applications requiring SMA, BNC, TNC and type-N connectors. The 1 W terminations operate from DC to 4 GHz (DC to 8 GHz for SMA units). Although the SWR performance of these terminations is good, their primary focus is high volume applications where a "throwaway termination" is desired. Price (1000): $5.30 (SMA male), $4.00 (BNC male) and $8.50 (TNC male or N male).
Ann Arbor, MI
850 - 870 MHz Coupler/Filter Assembly
The model 80017 hybrid coupler is a customized two-channel unit with type-N female connectors designed for the cellular base station transmitter combiner application. It operates over the 850 to 870 MHz frequency band and provides insertion loss of 3.5 dB (typ) and 4.0 (max) with isolation of 80 dB (typ) and 70 dB (min) and SWR of 1.25 (max). Maximum power input is 200 W (avg) and 500 W (peak).
Renaissance Electronics Corp.,
The MXR/2000 series surface-mount device (SMD) mixers are primarily used in base stations or handsets and are available in 10 to 3000 MHz frequencies. The mixers have a good IP3 at +16 dBm (typ) with a +7 dBm input LO input power and isolation at 40 dB (typ). The units are available on tape and reel for easy installation. Size: 0.175" x 0.125" x 0.100".
TRAK Microwave Corp., a Tech-Sym company,
Switched Iso-filter Banks
These switched iso-filter banks with removable SMA connectors have center frequencies of 960, 1000 and 1040 MHz and a 3 dB bandwidth of 50 MHz and 25 MHz at 1.0 dB. Insertion loss is 7.5 dB and SWR is 1.7. Additional features include reverse isolation of > 40 dB; ripples of 0.25 dB and a group delay of 4 ns (max) at +/-14 MHz.
ES Microwave LLC,