- Buyers Guide
GaAs IC Transfer Switch
The model AS127-59 GaAs IC four-port transfer switch is designed to combine transmit/receive and antenna changeover switching capability in one device. The switch offers a reduction in size and weight because it operates without a duplexer. The unit offers high linearity, which reduces the rejection requirements of filters, and delivers low insertion loss, translating into longer talk time and less power requirements. The switch has control voltages of 0/5 V and is suitable for applications that require low power consumption. The model offers high performance up to 2 GHz and is designed for dual-band applications.
(508) 628-4702, ext. 311.
These surface-mount, single-layer chip capacitors are available in 0202, 0302, 0303 and up to 0606 sizes, depending on the capacitance value. The capacitance range is from 0.5 to 500 pF with NPO, X7R and Y5V dielectric. (Additional dielectric materials are available.) The capacitance is available in tolerances of K (+/-10 percent), M (+/-20 percent) and Z (-20 and +80 percent). At 100 kHz, dissipation factor is 0.04 (max) and 0.025 (typ). Insulation resistance at 25°C is greater than 104 mW.
San Diego, CA.
Low Video Transient Switches
The models SWN-AKG-1DR-12-HS-LVT and SWN-AKG-1DR-12X-LVT SPST PIN diode switches operate from 0.5 to 18 GHz and are available in either reflective or absorptive versions. Isolation is typically 100 dB at 0.5 GHz and 80 dB at 18 GHz. Switching speed is £ 50 ns (typ) with rise/fall of £ 10 ns and insertion loss typically is 2.6 dB for reflective and 2.8 dB for absorptive. Power handling is +20 dBm operating and 1 W survival. The unit measures 1.0" x 1.0" x 0.5". Control is TTL compatible. Multithrow versions are available.
American Microwave Corp.,
3 dB Hybrid Couplers
The Xinger" series 3 dB hybrid couplers are available in 1.9, 2.4 and 3.5 GHz frequencies and are designed for personal communications service (PCS), wireless local area network (WLAN), personal branch exchange, wireless local loop (WLL), low noise amplifier (LNA) and power amplifier applications. Size: 0.560" x 0.200" x 0.075".
Anaren Microwave Inc.,
East Syracuse, NY
SMT Power Chokes
The SPR series power chokes occupy less than 0.125 square inches of board space, deliver current handling up to 3000 mA and are designed for the dense circuitry of portable applications, yielding inductances of 1 to 10,000 mH. Current ratings range between 50 and 3000 mA. DC resistance maximums range from 0.007 W for the 3000 mA model SPR-1R0K power choke to 26.4 W for the 50 mA model SPR-103K power choke. All cores in the series are composed of ferrite material, and carriers feature UL94V-0 safety ratings. The operating temperature ranges from -45° to +125°C. Delivery: stock to six weeks (ARO). Price: 95¢ each (10,000).
Associated Components Technology Inc.,
Garden Grove, CA
(800) 234-2645 or (714) 265-4800.
PIN Diode Limiter
The model DPL2080 PIN diode limiter is designed to protect RF assemblies from high power exposure over a broad frequency bandwidth of 2 to 8 GHz. Output power is limited to + 17 dBm (typ) with an input pulse power of 100 W. Recovery time is less than 5 ns with an insertion loss of 1.6 dB and SWR of 2. The high power protection limiter is available with SMA connectors or as a module package for surface-mount configurations. The unit is hermetically sealed and can be screened per MIL-STD-883 or MIL-STD-202 requirements.
Santa Clara, CA
Harmonic Lowpass Filters
The LP0805 series lowpass harmonic filters operate from 800 MHz up to nearly 3 GHz. The filters are available in two layouts that feature an impedance of 50 W, typical attenuation values of 30 dB at 2xfo and 20 dB at 3xfo, maximum insertion loss of 0.4 dB and maximum SWR of 1.7. Filter layout A features four frequency ranges between 890 and 960 MHz for Global System for Mobile communications (GSM) and Advanced Mobile Phone Service applications. Filter layout B features two frequency ranges between 1850 MHz and 2.484 GHz for PCS and WLAN applications. The surface-mount filters are constructed using a multilayer thin-film element with nickel/solder terminations that are compatible with reflow, wave and vapor phase soldering techniques. Operating temperature range is from -40° to +85°C. Delivery: 14 weeks. Prices: range from 35¢ to 40¢ each in volume quantities.
Myrtle Beach, SC
This PCS diplexer features passbands of 1850 to 1910 MHz and 1930 to 1990 MHz and achieves greater than 45 dB isolation with an insertion loss of less than 3 dB. The unit operates from -40° to +85°C, making it suitable for use in a broad range of harsh environmental conditions. SWR is less than 1.5.
ComNav Engineering Inc.,
These one-piece B-series connectors are designed for use with the company's EC3 series high flex cable. The connectors feature return loss of better than 30 dB up to 3 GHz for a short assembly with B-series connectors on each end. All contact parts are silver plated for good passive intermod performance (typically better than -160 dBc). Insertion loss is less than 0.1 dB per pair up to 2 GHz. The connectors are provided with type N or 7/16 male and female interfaces.
Eupen Cable USA,
Temperature and Power Sensing Terminations
These temperature and power sensing terminations are designed for applications where steady-state power dissipation cannot be tolerated. The terminations incorporate a thermistor temperature sensor that provides a variable resistance to ground that is proportional to the film temperature of the termination resistance element. In many applications, the terminations can replace more complicated designs using directional couplers and termination or high value (20 and 30 dB) attenuators to terminate an RF signal and provide a low level proportional signal to a diode detector. The high level output from the thermistor sensor also provides greater noise immunity than a low level output from a diode detector.
Florida RF Labs Inc.,
GaAs MMIC 1500 - 4500 MHz Mixer
The model HMC213MS8 GaAs MMIC mixer covers the 1500 to 4500 MHz frequency range and is packaged in an eight-lead plastic surface-mount MSOP. The mixer is constructed of GaAs Schottky diodes and novel planar transformer baluns on the chip. The device can be used as an up- or downconverter, biphase modulator or demodulator, or phase comparator for 1900, 2400, 3500 MHz applications. The MSOP8 package offers a footprint of 0.118" x 0.190" x 0.040". Delivery: stock.
Hittite Microwave Corp.,
3.4 GHz/3.5 GHz WLL Transmit and Receive Filters
The models 4DR24-3431X42 and 4DR24-3531X42 transmit and receive filters are designed for use in 3.4 GHz/3.5 GHz WLL systems. The units utilize ceramic technology to achieve low passband loss and high selectivity. The filters feature an insertion loss of less than 3.1 dB over fo +/-21 MHz and less than 2.3 dB over fo +/-21 MHz at the respective bands. In addition, rejection is greater than 30 dB and 25 dB in the adjacent bands. Size: 0.72" x 0.45" x 0.20". Delivery: four weeks.
K&L Microwave Inc.,
PCS Base Station Power Monitor/Detector
The model MIC-E46S power monitor detector is designed to calibrate main-line circuit power in PCS base station applications. The unit comprises a directional coupler and linear detector circuit, and features a rugged alumna package that improves overall performance. The thermal properties of the substrate provide a combination of added operational thermal stability as well as mechanical strength and integrity. The unit operates from 1.7 to 2 GHz with an SWR of 1.35 (typ) and insertion loss of 0.3 dB (typ). The 0 to 5 V DC output is proportional to the -8 to +12 dBm input RF power levels. The unit incorporates an op amp and requires +5 V DC input at 1 mA.
(973) 887-8100, ext. 500.
Pole-placed Ceramic Filter
The model 4DF12-449/6-N pole-placed ceramic filter features a center frequency of 449 MHz, resulting in enhanced selectivity. The filter has a passband of 6 MHz, insertion loss of less than 1.2 dB and SWR of 1.5. Passband flatness at fo +/-3 MHz is less than 0.5 dB and rejection at fo +/-8 MHz is greater than 20 dB.
(800) 780-2169 or (410) 860-5100.
RF One-step Connectors
These RF connectors terminate coaxial cables in one step, resulting in reliable, high performance terminations. The connectors have a cable retention strength of up to 200 lb, thereby creating a robust soldered and insulated termination on 50 and 75 W cables. The units are available in three sizes that accommodate a broad range of standard RG/U cables and the company's Cheminax" coaxial cables. In addition, the connectors are fully intermateable with MIL-C-39012 connectors and meet the performance requirements of MIL-C-39012 up to 2.8 GHz.
Menlo Park, CA
2500 W Electronic Loads
The L-2500 series electronic loads consist of three loads that are rated at 2500 W and 500 A (max). All units are designed primarily for evaluation, testing and burn-in of AC/DC switch mode, linear and ferro-resonant power supplies with output voltages ranging from 1.25 to 80 V DC. The units also can be used for burn-in and testing of DC-DC converters and batteries within stated output ranges. All units are available with either a 115 or 230 V AC input. The models L-2501 and L-2511 are designed primarily for single-output power supplies. The model L-2514 state-of-the-art, four-channel DC load is designed for evaluating, burn-in and testing of single-, dual-, triple- or quad-output supplies, and offers user-load banks. Maximum power dissipation is 2500 W at 30°C.
HC Power Inc.,
The models LB-C01 and LB-C03 lowpass filters feature low passband loss and intermodulation, and an average power capability of 500 W. The units are designed for a passband up to 174 and 329 MHz, respectively. The filters run cooler than lumped-element filters and reflect less power back to the transmitter.
Three-pole Ceramic Bandpass Filter
The model C0125101 three-pole ceramic bandpass filter operates from 2496 to 2524 MHz (min) at a center frequency of 2510 MHz. Insertion loss is less than 3 dB, passband ripple is 0.1 dB peak to peak (max), 50 W SWR is less than 1.5 over the passband and rejection is greater than 30 dBc from DC to 2350 MHz and 2670 to 4000 MHz. The unit operates at a -20° to +70°C temperature range. Size: 0.18" x 0.48" x 0.30" (nom), excluding ground tabs.
Microwave Circuits Inc.,
38 - 40 GHz Bandpass Filters
The 12800 series bandpass filters remove interfering carriers from broadcast or receive frequencies in the 38 to 40 GHz frequency range. The filters are custom designed to meet specified passband, insertion loss and rejection. Typical passband return loss is 16 dB over the operating bandwidth. The units are designed to operate within a temperature range of -20° to +50°C, but also can be built in silver-plated Invar for extended temperature ranges. The filters are equipped with WR28 cover flanges.
Microwave Filter Co.,
East Syracuse, NY
(800) 448-1666 or (315) 438-4747.
Broadband Power Divider Tee
The model 5340 broadband, resistive, pick-off power divider tee provides a large-value resistor to pick off a small portion of an incident signal. Two additional one percent tolerance resistors are added in the main signal path to provide impedance matching. The tee maintains the input impedance matched precisely to 50 W. Several models with various decibel couplings and pick-off ratios of 6 to 40 dB are available. Delivery: four weeks. Price: $220.
Picosecond Pulse Labs,
The model PSX-D lightning protector is DC blocked and weatherized, and is available in a DIN-/N-type connector configuration. The protector offers maintenance-free operation for use with receivers, and single- or multichannel transmitters. The unit exhibits a low surge throughput energy of £ 0.5 mJ and a let-through voltage of = +/-3 V for 3 kA at an 8/20 ms waveform. Insertion loss is £ 0.1 dB and SWR is £ 1.1 over the 1.7 to 2.3 GHz frequency range.
(800) 325-7170 or (702) 782-2511.
The model RFB-1141 BNC female-to-Motorola phono plug adapter is recommended for use with the GP 300, P110 and P120 series cellular units, which feature nickel-plated machined brass bodies with gold-plated BNC contacts and Teflon" insulation.
RF Connectors, a division of RF Industries,
San Diego, CA
Full-flanged Resistors and Terminations
The model RFP100-100RW 100 W resistor features a 100 W resistance value and low 1.5 pF capacitance. The model RFP-100-50TW termination also offers 100 W of power with 50 W and operates from DC to 6 GHz with an SWR of less than 1.2. Both devices feature silver leads and are suitable for use in amplifier, isolator, PCS and personal communications network applications. The units measure 0.800" x 0.225" and are constructed using thick-film techniques on a ceramic substrate. Delivery: stock to four weeks.
RF Power Components Inc.,
(516) 563-5050, ext. 230.
Thin-film Chip Attenuators
These thin-film chip attenuators are designed for use in applications where reduction in an electrical signal is required. Four termination styles are available, and metallization options include solderable, epoxy-bondable and wire-bondable types. The attenuators are constructed with an alumina body and proprietary thin-film resistor element for optimum performance. The units are available with attenuation factors of 1 to 20 dB in 0.5 dB increments, and rated at 50 V maximum voltage and 0.125 W maximum power. In addition, the units operate from DC to 18 GHz with an SWR as low as 1.2, depending on size, style and frequency. Price: $1 each in production quantities. Delivery: eight to 10 weeks (ARO).
State of the Art Inc. (SOTA),
State College, PA
C-type Coaxial Connectors
These SC coaxial connectors are similar to C series bayonet types but are threaded to provide a secure coupling for permanent installations that are subject to vibration. The connectors are designed for cables from 0.141" up to 5/8" and are available as straight- and right-angle plugs, panel- and bulkhead jacks, receptacles, and in- and between-series adapters. The units are available in standard 1000 V and high voltage versions up to 5 kV or stainless steel and nickel or silver plated with beryllium-copper center conductors that can be gold or silver plated. Mounting provisions include on-cable, single-hole and square-plate mating connectors.
The models POC 101, POC 102 and POC 104 optocouplers (part of the company's solid-state Power Optocouplers series) are designed to provide a simple, low noise means of realizing direct, isolated DC-to-DC conversion. The units utilize infrared emitters and silicon photovoltaic cell arrays. All modules are constructed using advanced hybrid circuit techniques and are available in evaluation quantities in dual-inline packages with 0.4" row spacing and surface-mountable ceramic chip packages. The units have been 100 percent tested to withstand 5000 V RMS between input and output.
Sunbelt Micro Modular Products, a subsidiary of Mini-Systems Inc.,
North Attleboro, MA
WLAN SAW Filters
The models SA280ZA-002, SA280HS-003 and SA280HS-004 SAW filters feature a 3 dB bandwidth of 1.5 MHz. The model SA280ZA-002 is the smallest of the three units, measuring only 0.19" x 0.36" x 0.07". The model SA280HS-003 offers the best attenuation of the devices, achieving 40 dB at +/-2.875 MHz. Typical insertion loss ranges from 8.1 dB for the SA280HS-003 filter to 9.1 dB for the SA280HS-004 filter. All devices are available on tape and reel and are reflow solderable. Prices: $5.50 (1000) for the SA280HS-003 and SA280HS-004 units, and $5.10 (1000) for the SA280ZA-002 unit.
Toko America Inc.,
Mt. Prospect, IL