- Buyers Guide
Ultra-broadband Eight-way Power Divider
The model ADC-PD-0218 ultra-broadband power divider covers the 2 to 18 GHz frequency range and features good phase and amplitude balance across all eight output ports. Standard units operate over the full -54° to 85°C temperature range with good port-to-port tracking of +/-0.7 dB with an insertion loss of 13 dB (max). Output flatness across the frequency band is +/-1.5 dB and worst-case isolation between adjacent ports is 17 dB. In addition, input and output SWR is 2.5. Size 2.825" x 1.970" x 0.400" (without connectors).
South Hackensack, NJ
500 MHz - 2.5 GHz Variable Attenuator
The model AV107-59 GaAs IC 35 dB voltage-variable attenuator is controlled by a single positive voltage. The unit features a linear transfer curve of 12 dB/V slope with an input and output SWR of better than 2 over all states. At 900 MHz, the unit's attenuation range is 35 dB. In addition, the attenuator operates with a supply voltage of +3 V in a low cost MSOP-8 package. Price: $3.65 (10,000).
LMDS Bandpass Filter
The model CEC-1676 local multipoint distribution service (LMDS) bandpass filter operates from 28.160 to 28.370 GHz and rejects 50 dB at +/-1.350 GHz with an insertion loss of less than 1.5 dB and return loss of greater than 20 dB. The unit's compact size allows for easy installation. The filter can handle up to 25 W (peak). (Notches can be added for greater sideband rejection for an additional charge to enhance bandedge rejection.) Standard connectors are type CPR28 EIA flange.
Communications & Energy Corp.,
East Syracuse, NY
(800) 882-1587 or (315) 452-0709.
Fast-disconnect Cable Assemblies
These high reliability/quality fast-disconnect cable assemblies are designed for use in the medical, nuclear, audio/video, telecommunications and military markets. A quick push connects the plug to the receptacle. High voltage versions are also available.
Christensen Smith Tran (CST),
2 - 2.3 GHz Hybrid Coupler
The model JX503 surface-mount, low profile, miniature 3 dB hybrid coupler (part of the company's Xinger® series) is designed for use in Japanese wideband-CDMA (W-CDMA) and European Universal Mobile Telecom System applications. The unit provides a minimum isolation of 23 dB, maximum insertion loss of 0.20 dB, maximum SWR of 1.17, peak amplitude balance of +/-0.20 dB and peak phase balance of 2°. In addition, the hybrid coupler's maximum average power is 60 W.
Anaren Microwave Inc.,
East Syracuse, NY
SMR Interference Solutions
The model CCRF-33 specialized mobile radio (SMR) interference solution provides greater than 60 dB of attenuation from 851 MHz to 1 GHz. Insertion loss is minimized to less than 1 dB over 824 to 846.5 MHz. The B-band model CCRF-34 offers 35 dB rejection over 851 MHz to 1 GHz and 1.5 dB maximum insertion loss over 824 to 849 MHz. Size: 10.0" x 4.5" x 3.5" (including N female connectors).
ClearComm Technologies Inc.,
RF Press-fit Receptacles
These MCX, BNC, TNC, SMA and N series press-fit receptacles save space and assembly time and eliminate the need for lock nuts, screws and mounting hardware. The connector is pressed into a single mounting hole and held tightly in place by the exact dimensions of the knurled rear body. Retention force exceeds the mating/unmating forces of the plug.
SPDT Miniature Fail-safe Switches
The 409 series low cost, miniature fail-safe switches operate from DC to 3 GHz. Designed to be PCB mounted, these 50 W impedance switches with actuating voltages of 12 or 28 V DC are intended for microstrip applications. The units can be hot switched at 10 W CW and can handle up to 50 W CW. The insertion phase repeatability of these miniature switches from port to port is within 0.01 dB for a 100 MHz bandwidth. Additional specifications include an SWR of 1.2 (max), insertion loss of 0.3 dB (max) and isolation of 70 dB (min). Delivery: stock to six weeks.
Dow-Key Microwave Corp.,
High Performance SIP Reed Relay
The 9090 series SIP reed relay features a molded thermoset body on an integral lead frame design, high insulation resistance and high reliability hermetically sealed contacts for long life. The relay is tested to one billion operations. Price: less than $2 in volume quantities. Delivery: stock to six weeks.
Bandpass/Band Reject YIG Filter
The model MR1819 bandpass/band reject yttrium iron garnet (YIG) filter consists of a dual four-stage bandpass YIG filter with a 3 dB bandwidth of 25 to 40 MHz as well as a six-stage band reject YIG filter to track the bandpass filter over the 2 to 6 GHz frequency range. The rejection bandwidth at 30 dB is 5 MHz increasing to 30 MHz with an off-resonance insertion loss of 1.5 dB. With a TTL of 0, the bandpass and band reject filters are active in the circuit. The filters are bypassed with a TTL of 1 achieving a 2 dB loss from 2 to 6 GHz. The unit can be integrated with an analog driver with 0 to 10 V control or 12 bit digital driver to tune the unit over its frequency range.
Santa Clara, CA
The SmartLoads series microwave power-sensing terminations offer straight-line linear performance over a wide dynamic range. The units are diode free, yet detect RMS signals with good clarity. The terminations are completely passive and, therefore, are not the source of intermodulation themselves. When used in conjunction with the company's Thermopads® and a bridge circuit, the units become insensitive to variation as temperature changes. When used with high power attenuators, good response at power levels exceeding 150 W is possible.
EMC Technology LLC,
Cherry Hill, NJ
High Performance Jumper Cables
The EC3 series jumper cables provide good electrical and mechanical performance along with reliable, long-term weather sealing. The units are available in both 0.5" high flexibility cable for use in in-the-shelter applications, and 0.5" standard flexibility cable for use in feeder-to-antenna applications. A full range of connectors are available, including 7-16 DIN, N and 7/8" EIA. The connectors feature a reflection coefficient of less than two percent up to 2.5 GHz, resulting in an SWR of 1.08. The connectors are attached using nonflush cut methods to eliminate copper particles in the interface. Both inner and outer contacts are spring loaded to maintain high contact pressure over time, resulting in long-term passive intermodulation levels of -150 dBc or better. All jumpers are 100 percent tested for SWR and insertion loss. The jumper cables are available in standard lengths of 3', 6', 8' and 10'.
Eupen Cable USA,
Vertical Coaxial Remote Termination
The model 12-5005 coaxial remote termination features an SMA connector and coax cable up to 100" long and can be located anywhere in a system. The unit's low SWR allows higher isolation in circulators and greater directivity in couplers to be achieved. The termination is rated for 150 W CW at 100°C and has a typical SWR of 1.05 from DC to 2 GHz. The housing material is aluminum with silver plating for applications where improved intermodulation distortion specifications are required.
Florida RF Labs,
(800) 544-5594 or (561) 286-9300.
23 GHz Diplexer
This diplexer provides low insertion loss and good rejection. The passbands can be adjusted between 21.5 and 23.3 GHz with a transmit-to-receive spacing of 1200 MHz and bandwidth of 600 MHz. In addition, isolation between the channels exceeds 50 dB while insertion loss is typically less than 1 dB. Size: 5.3" x 1.1" in WR-42 waveguide.
Filtel Microwave Inc.,
Vaudreuil-Dorion, Quebec, Canada
11-bit Digital Microwave Attenuators
The 349 series 11-bit PIN diode attenuators cover the 1 to 18 GHz frequency range. The digitally controlled units operate over octave frequency bands, switch in less than 300 ns and are available in 64 and 80 dB versions with minimum step sizes of 0.03 and 0.04 dB, respectively. The attenuators operate over the temperature range of -40° to +85°C with a temperature coefficient of +/-0.025 dB/°C. An analog input is available on all units or a strobe latch can be incorporated as an option. The units are equipped with SMA connectors. Size: 3.00" x 2.00" x 0.82".
General Microwave Corp.,
(516) 226-8900, ext. 291.
Triple-output DC/DC Converters
The HPT series triple-output DC/DC converters provide 15 W of output power in the industry-standard 2" x 2" package and footprint. The units feature 100°C baseplate operation, 500 V DC isolation, good efficiency, class A conducted noise specs and industry-leading power density. The converters feature an open-frame packaging concept, which allows for optimal cooling and compatibility with industrial board cleaning processes. Additional features include a wide 3:1 input voltage range of 10 to 30 V DC or 20 or 60 V DC. Four output voltage combinations are available: 5 V with +/-12 or +/-15 V and 3.3 V with +/-12 or +/-15 V. A full complement of protection features are offered, including output overvoltage, input undervoltage, short circuit and overtemperature protection. Reliability is more than 2.5 million hours calculated to Bellcore standard TR-NWT-000332. Delivery: stock to six weeks. Price: $32 each (original equipment manufacturer (OEM) quantities).
International Power Devices Inc.,
Solid-state Programmable Attenuator
The model 50P-1238 digitally latched, solid-state programmable attenuator features an at-tenuation range of 63 dB in 1 dB steps over a frequency of 800 to 2100 MHz. The unit offers an attenuation accuracy of +/-0.3 dB or two percent of the programmed value. The solid-state design provides high reliability, long life and a switching speed of 5 ms. Third-order intercept point (IP3) is specified at +40 dBm (min) with video transients rated at 10 mV (max). TTL programming (six lines) is accomplished via a T&B control connector with TTL low for a 0 setting and TTL high for an attenuation setting. RF connectors are SMA female.
JFW Industries Inc.,
800 - 2300 MHz Subminiature Ceramic Couplers
The HD-S series subminiature, surface-mount ceramic couplers feature a high degree of frequency matching and low loss, frequency range of 800 to 2300 MHz, impedance of 50 W, usable power of 10 to 20 W (max) and operating temperature range of -10° to +65°C. The units are supplied on reels or individually packaged. Price: $12 (in OEM quantities).
Hirose Electric (USA) Inc.,
Simi Valley, CA
DC - 2 GHz GaAs FET MMIC Digital Attenuators
These DC to 2 GHz GaAs FET MMIC digital attenuators with integral application-specific IC (ASIC) drivers offer high performance, single-plastic-package solutions that are well suited for both transmit and receive applications in wireless communications systems. The units are multichip modules with GaAs FET MMIC RF chips and silicon CMOS ASIC driver chips. The attenuators are supplied in plastic packages and are available in tape-and-reel packaging for high volume applications. Six models are available with dynamic ranges of 50, 31.5, 15, 30, 31 and 15.5 dB. Price: less than $17 each (1000).
M/A-COM, a division of AMP Inc.,
Triaxial Pair Relay
The 7900 series triaxial pair relay is available in sizes ranging from 2 to 24 throws and can be used in several applications, including switching MIL-STD-1553 bus signals; routing emitter-coupled logic and audio pairs; low noise, low level switching using driven shield techniques; and very low leakage current measurements using semiconductor parameter analyzers. The relay is available with RS-232 or IEEE-488 control when mounted in the company's model 11600 chassis and control unit.
Mechanically Tunable CDMA Transmit Combiner
The model WSC2-00011 PCS-band mechanically tunable CDMA transmit combiner features a passband insertion loss of 1.5 dB (max) and passband-to-passband isolation of 30 dB (min) with a 1 CDMA carrier-to-carrier separation. The unit can be tuned to any CDMA carrier assignment within the PCS base transceiver station transmit frequency range of 1930 to 1990 MHz. This capability presents a particular advantage to multiple provider sites because CDMA carriers from several service providers can be placed on a single-sector transmit antenna, thus allowing expansion of the site without incurring the additional cost of installing antennas, feeder cables and zoning approvals. The transmit combiner provides 23 dB (min) antenna-to-transmit input isolation, 20 dB (min) transmit input port return loss, 14 dB (min) antenna port return loss, 100 ns (max) channel group delay and is specified to produce -75 dBm (max) intermodulation products with two +44 dBm transmit carriers applied. Size: 9.5" x 6.0" x 2.7" (excluding type N-F connectors). Delivery: stock.
K&L Microwave Corp.,
SATCOM Dual-channel Waveguide and Coaxial Rotary Joint
This satellite communications (SATCOM) compact dual-channel waveguide and coaxial rotary joint features a waveguide channel that operates from either 5.9 to 6.4 GHz or 7.8 to 8.4 GHz with an SWR of less than 1.2 and insertion loss of less than 0.2 dB. The unit also features a type N coaxial channel that operates from either 3.7 to 4.2 GHz or 7.2 to 7.8 GHz with an SWR of less than 1.2 and insertion loss of less than 0.2 dB. The waveguide channel is pressurized and capable of handling high power up to 2 kW CW. The mechanical interface is identical for each rotary joint, which allows for interchangeability in the system.
Microwave Development Laboratories Inc. (MDL),
Needham Heights, MA
Three-way Power Divider
The model PDD-3N-2.3G three-way power divider is designed for high reliability and has no internal solder connections. The resistors and copper circuit pattern are etched in a metal film. In addition, the divider uses a low loss dielectric to achieve 0.20 dB insertion loss over a 26 percent bandwidth and provides isolation greater than 20 dB over the specified band. The unit operates over the 2.2 to 2.3 GHz and 2.4 to 2.5 GHz bands. Operating into matched loads, the divider operates up to 50 W CW. However, due to the power rating of the node resistors used in this specific design, operation must be limited to 1 W CW for fail-safe operation at maximum load SWRs of 2. Additional specifications include an amplitude balance of 0.1 dB, phase balance of 3°, input impedance of 50 W (nom) and input return loss of 15 dB. Size: 0.48" x 0.65" x 0.10".
Merrimac Industries Inc.,
West Caldwell, NJ
80:20 Unequal Power Splitters
The DG-54 series unequal power splitters are designed to split high power cellular signals in the ratio of 80:20. The units combine the low loss benefits of the reactive two-way power splitter with the unequal split nature of the directional coupler. In addition, the units feature minimal reflections and good reliability. The power splitters' mechanical shape also allows simple attachment to a wall or ceiling using clips or clamps.
The model BTLNFNFO700W bias tee (from the company's Surge Guard series) features a lightening protector and is designed for DC injection or retrieval. (The unit also can be used as a DC block.) The device offers multiple-strike capability (via a gas discharge tube) in a compact, rugged package. Mounting can be accomplished via a bulkhead or directly onto a grounding plate. Features include full 400 to 1000 MHz coverage in one unit, good SWR and insertion loss, high RF/DC isolation, good reliability and intermodulation characteristics, N type 50 W connectors, mechanical integrity and guard-plate plating.
5 W Attenuators
The Unidapt® RFA-4043 and RFA-4044 series 5 and 10 W attenuators are available in 3, 10, 20 and 30 dB versions featuring silver-plated, machined brass bodies with gold-plated contacts and Teflon insulation. Any male-to-male, female-to-female or male-to-female adapter needed can be produced quickly and easily. All of the units are rated for use at frequencies from DC to 4 GHz.
RF Connectors, a division of RF Industries,
San Diego, CA
The model MDC1089A phase-adjustable in-line adapter offers a precise means of phase adjustment over the frequency range of DC to 4 GHz. By turning a phase adjustment nut, the user can create a small increment change in cable length and hence, phase up to a maximum of 40° at 4 GHz. Unlike other phase-matching techniques with limited frequency ranges that may hamper performance or require use of more than one model, each broadband phase-adjustable adapter covers the entire range with low SWR and high accuracy in adjustment that is 10-times the frequency in gigahertz. All adapters and the direct solder on connector types (which operate well with the company's Ultraflex series cable) operate at temperatures from -65° to +125°C and are designed to meet various applicable military environmental specifications. All types are available from stock.
Coaxial Electromechanical Switches
These coaxial electromechanical switches are designed to address a wide variety of applications, including Hi-rel and military. Also available are switches for use in energy, railways and industry.
Cellular and PCS SWR Alarm Modules
The models 8460-N1 (Advanced Mobile Telephone System band) and 8480-N1 (PCS band) low cost SWR monitors are designed for use in cell site transmit antenna cables. The units continuously measure RMS forward and reflected RF power and trigger an internal SPDT form C latching alarm relay and alarm light-emitting diode when the antenna SWR exceeds a user-adjustable threshold. The alarm level can be set from 1.2 to 2.5. The units also feature a one-second alarm activation time that eliminates false alarms due to rapidly fluctuating RF transmit power. The alarm modules are equipped with built-in, dual-directional sampling couplers for monitoring the transmit line.
Narda Microwave-East, a division of L-3 Communications,
5.4 - 5.9 GHz Surface-mount Circulator
The model 0590CHD four-port surface-mount circulator is designed to provide a high isolation of 40 dB (min) at 5.4 to 5.9 GHz. The circuit tabs are in line with the bottom of the ground plane and the unit weighs less than 4 grams, making it suitable for surface mounting. The circulator offers low insertion loss of 0.5 dB with an SWR of 1.2 on all ports over the temperature range of -40° to +85°C. Size: 1.00" x 0.57" x 0.15".
Morgan Hill, CA
DC - 18 GHz Surface-mount Transfer Switches
These miniature surface-mount transfer switches combine high performance in a compact configuration. The units provide high reliability, long life and good electrical performance characteristics in a miniature package. The switches operate from DC to 18 GHz with a power rating of 10 W and impedance of 50 W. In addition, switching time is 15 ms (max), operating power at 25°C is 12 V DC at 185 mA and 28 V DC at 108 mA, and switching sequence is break before make. Weight: 7 oz.
RLC Electronics Inc.,
Mt. Kisco, NY
Broadband, High Performance Microwave Mixers
The MR144 series broadband double-balanced mixers operate from 4 to 18 GHz and offer low conversion loss of 6 dB (typ) midband and flat IF response with good spurious product suppression. The wide DC to 1000 MHz IF bandwidth design makes the units suitable for use in up- and downconversion applications. LO-to-RF isolation is 30 dB (typ). The mixers are available for various LO drive levels from +7 to +18 dBm. Size: 0.80" x 0.59" x 0.19".
Sage Active Microwave,
This capacitively decoupled BNC connector is designed to decouple electromagnetic interference (EMI) on the coaxial shield through the capacitor to chassis ground without influencing the signal terminations. The connector offers a capacitance of 10,000 pF +/-20 percent, voltage rating of 500 V DC and current rating of 3 A. In addition, the connector filters frequencies effectively from 1 MHz to 3 GHz with both source and load impedances of 50 W. The dielectric withstanding voltage is 1000 V DC for 5 s.
Spectrum Control Inc.,
7-16 DIN Panel Receptacles
These 7-16 male and female panel-mount receptacles use the type N mounting hole pattern to allow conversion from UG-58/U to 7-16 using the same 1" square existing pattern without modification. The units feature a new mounting plate with an integral raised conductor seal (to create a tight fit) and a female solid outer conductor. Intermodulation is less than 155 dB (typ) or better. Constructed with either gold or silver center conductors, beryllium copper contacts and Teflon insulators, the receptacles can incorporate silver-plated TruLustre (tri-metal plated) brass bodies. Price: starts at $12.95, depending on quantity.
INMARSAT Phase Shifters
These INMARSAT phase shifters for phased-array applications are available as three- or four-bit units in switched-line designs. (Individual bit values vary linearly vs. frequency.) All of the units feature low insertion loss and good phase accuracy. Several different internal TTL driver options are available with switching times as low as 200 ns. Logic circuitry (including data latches and address decoders) also can be included to simplify control of individual phase shifters in an array. Custom configurations can be provided to fit a variety of packaging needs.
Vectronics Microwave Corp.,
100 W Single Directional Coupler
The model SDC-801-1-2-R5-11 100 W single directional coupler is designed for use in cellular and wireless applications. The unit operates from 810 to 960 MHz with less than 0.2 dB insertion loss, 11 dB coupling, greater than 20 dB directivity, and main- and coupled-line SWR of less than 1.15 and 1.20, respectively. Type N connectors are provided in a small package measuring 3.0" x 1.5" x 1.0" with other connectors available upon request. All specifications are based on all ports terminated into 50 W. Additional specifications include coupling of 11 dB +/-0.2 dB, aluminum alloy finish and a temperature range of -55° to 85°C. Delivery: stock to five weeks.
RF Power Components Inc.,
Surface-mount Ceramic Trimmer Capacitors
The 513 series ceramic trimmer capacitors (part of the company's VARI-THIN® line) feature a capacitance of 1 to 3 pF to 15 to 60 pF, voltage rating of 100 V DC from -55° to +85°C and tape-and-reel packaging. In addition, torque is 4 to 20 oz/in and three basic terminal configurations are provided. The ceramic base seats directly on module substrates or circuit boards with no mechanical or metal protrusions beneath the base plane. The units utilize a monolithic rotor design that offers good stability for higher capacitance ranges.
Four-way Resistive Power Divider
The model 1594 four-way resistive power divider features broadband performance, good tracking between ports, miniature size and light weight. Specifications include a nominal impedance of 50 W, frequency range of DC to 18 GHz, insertion loss of 12 dB (max), SWR of 1.3 (max) and input power of 2 W CW (max). The unit operates from a temperature range of -55° to +100°C. The 3.5 mm female connectors on all ports mate nondestructively with other connector types, including SMA, 2.92 mm and 3.5 mm. Weight: 1.05 oz (max).
(800) 638-2048 or (301) 846-9222.
10 W Fixed Coaxial Attenuator
The model WA8 10 W average power attenuator features type N connectors and is designed to meet environmental requirements of MIL-A-3933. The unit features a nominal impedance of 50 W; frequency range from DC to 18 GHz; and maximum SWR of 1.2 from DC to 8 GHz, 1.3 from 8 to 12.4 GHz and 1.35 from 12.4 to 18 GHz. Price: $110.
Weinschel, Bruno Associates,
Get access to premium content and e-newsletters by registering on the web site. You can also subscribe to Microwave Journal magazine.