- Buyers Guide
Thin-film Directional Couplers
The CP0805 series thin-film directional couplers feature typical coupling performance of 16 dB over a wide frequency range. The units are available in two basic configurations with five different coupling types that feature characteristic impedance of 50 W, maximum insertion loss of 0.25 dB and maximum SWR of 1.2. The first configuration features four frequency ranges between 890 and 960 MHz for Global System for Mobile communications (GSM) and Advanced Mobile Phone Service (AMPS) applications. The second configuration features seven frequency ranges from 1710 MHz to 2.484 GHz for personal communications service (PCS), personal communications network (PCN), personal handyphone, Digital European Cordless Telephone and wireless local area network (WLAN) applications. The couplers are constructed using a multilayer thin-film element with nickel/solder terminations that are compatible with reflow, wave and vapor phase soldering techniques. The operating temperature range is from –40° to +85°C. Price: 33¢ each in production quantities.
Myrtle Beach, SC
Reverse-polarity RF Coaxial Connectors
These BNC, SMA and TNC connectors feature insulators and center contacts that are reversed in polarity from standard connectors. (All other parts are unchanged from standard configurations.) The polarized connectors can be supplied with color marks or bands for identification and are available with a variety of options, including cable plugs and jacks; panel and bulkhead receptacles; and nickel or silver body plating for BNC and TNC types, gold or passivated finish for SMA types and Albaloy plating for BNC and TNC types.
Delta Electronics Manufacturing Co.,
High Power, Multichannel Backup Switch
The 4D5 series low cost, high power, five-pole, four-throw coaxial switch with SMA connectors is designed for cell site amplifier switching. The switch operates from DC to 3 GHz and features multiple inputs and outputs with one redundant output. In addition, the unit connects multiple amplifiers with multiple signal sources to the output of multiple amplifiers and antennas. Insertion loss is 0.2 dB (max), isolation is 60 dB (min), SWR is 1.2 (max), power handling is 50 W CW and switching time is 15 ms.
Dow-Key Microwave Corp.,
High Voltage Resistor
This high voltage resistor is designed for use in UHF and VHF transmitter and RF sputtering applications. Its 4 kV design offers improved breakdown voltage performance over standard RF resistors. Power handling is 750 W. Lower power models are available up to 500 MHz. The unit also is available flangeless or as a termination.
Florida RF Labs Inc.,
PIN Diode Drivers
These PIN diode drivers are fully screened to MIL-STD-883 and are packaged in low profile flatpacks or as unpackaged populated substrates that are readily integrated into switch housings. The drivers offer reverse voltage protection, 10 to 100 ns switching speeds, 10 to 200 mA output currents, TTL gate inputs, SPST to SP6T (one to six channels each with independent inverting and noninverting capability), VCC = +5 V and VEE = –5 to –15 V.
General Microcircuits Corp., a subsidiary of General Microwave Corp.,
The QUICK-FIT™ series connectors assemble quickly to all popular 1.25" and 1.625" corrugated cables. The two-part design easily attaches to cable with no special tools. The fail-safe assembly of the mechanical interconnect is suitable for operator in-field installations. Available in both 7/16 and type N interfaces, the connectors feature a triple-gasket design (corrugation, jacket and center conductor) that passes the IP 68 (IEC 529) standard for moisture resistance. The units exhibit low passive intermodulation of –155 dBc. The temperature range is from –40° to +185°F.
Essex Junction, VT
5.8 GHz Low Loss, ISM-band Ceramic Filter
This 5.8 GHz ceramic bandpass filter is designed for upper industrial, scientific and medical (ISM)-band applications and provides less than 1.2 dB passband insertion loss over a two percent bandwidth. Typical rejection is better than 35 dBc at 5.286 and 6.41 GHz. SMT or thru-hole configurations are available. The unit is reflowable, suitable for pick and place, and available with tape-and-reel packaging.
Integrated Microwave Corp.,
San Diego, CA
Surface-mount PIN Diode Attenuators
The PI-800 series attenuators from the company’s Surfpac line feature good intermodulation performance from 100 MHz to GHz compared to GaAs alternatives, and are designed for use in PCS and cellular base stations. The attenuators combine a narrow bandwidth with an insertion loss of 0.6 dB (max) for a model with a 0 to 20 dB attenuation range. The attenuators feature an SWR of 1.5 (max) and typical frequency bandwidths include 1.84 to 1.95 GHz and 3.5 to 4 GHz. Size: 0.750" x 0.550" x 0.025".
KDI/triangle Corp., an MCE company,
(973) 887-8100, ext. 500.
The models WF-00004 and WF-00007 full-band PCS transmit and receive filters offer high selectivity and low insertion loss in a small package. Each filter offers a passband insertion loss of less than 0.9 dB (0.8 dB (typ)) and a passband flatness of less than 0.4 dB. Rejection frequencies for the receive band are DC to 1830 MHz greater than 40 dB and 1930 to 1990 MHz greater than 60 dB. Rejection frequencies for the transmit band are DC to 1910 MHz greater than 60 dB and 2010 to 6000 MHz greater than 50 dB. Return loss for each filter is better than 15 dB. Size: 4.57" x 2.40" x 1.15" (not including connectors).
The model SB-60/2 surface-mount filter is available with a 50 or 75 W impedance and is centered at 600 MHz. Insertion loss is 3 dB (max) and SWR is 1.5 (typ). In addition, minimum rejection is 20 dB at 50 MHz, 30 dB at 70 MHz, 45 dB at 35 MHz and 60 dB at 85 MHz. Ultimate rejection is 40 dB to 2500 MHz. Size: 1.00" x 0.25" x 0.28".
K&L Microwave Inc.,
Surface-mount Resistor Networks
The SMR series high reliability precision resistor networks are designed for fine-pitch, surface-mount applications. The resistors feature a lead pitch of 0.031" and are available in four to 16 pin out styles. The standard value range is 2 W to 10 MW in isolated or common-bussed configurations with tolerances to 0.5 percent. Temperature coefficient of resistances are available to 100 ppm/°C. The protruding, five-sided, nickel-barrier terminations enhance solder attachment and inspection. The footprint for the model SMR 8 four-resistor network is a 1206 case size.
North Attleboro, MA
28.16 - 28.37 GHz Bandpass Filter
The model 12218 bandpass filter passes the frequencies of 28.16 to 28.37 GHz and suppresses lower sideband interference and unwanted carriers contained in the output of the mixer in local multipoint distribution service (LMDS) transmitters. The unit features a passband loss of 1.5 dB (max), return loss of 16 dB (min) and stopband attenuation of 60 dB (min) from 27.45 to 27.66 GHz and 30 dB (min) at 27.91 GHz. Input level is –10 dBm (max), operating temperature is 0° to 50°C and humidity is 99 percent noncondensing. The unit is supplied standard with WR28 cover flanges.
Microwave Filter Co. Inc.,
East Syracuse, NY
(800) 448-1666 or (315) 438-4747.
Four-way Power Splitter/Combiner
The model ZB4PD1-5.8 4.6 to 5.8 MHz, four-way, 0° power splitter/combiner delivers high 25 dB (typ) isolation, low 0.4 dB (typ) insertion loss above 6 dB and typically low in/out SWR of 1.1 and 1.15, respectively. Maximum amplitude unbalance is 0.4 dB and phase unbalance is 5°. As a splitter, power input is 1 W (max) when operated within the –55° to +100°C temperature range. Price: $129.95 each for less than 10 units.
These application-specific, surface-mount two-way power dividers are designed to cover the cellular, PCS and WLAN frequency bands. In addition, the devices offer good electrical specifications. Price: $2 in production quantities.
Pulsar Microwave Corp.,
1750 - 1990 MHz 90° Hybrid Couplers
The models S03A1870N1 (100 W CW) and S03B1870N2 (200 W CW) surface-mount 90° hybrid couplers operate over a frequency range of 1750 to 1990 MHz and are constructed using leadless, nonceramic, bonded stripline circuitry with plated-thru technology. The S03A1870N1 has a low insertion loss of less than 0.3 dB and the S03B1870N2 has an insertion loss of less than 0.2 dB. Both devices have an SWR of less than 1.25 and isolation of greater than 20 dB. Amplitude and phase balance are +/-0.3 dB and +/-1.5°, respectively. The units operate over a temperature range of –55° to 85°C. Size: 0.350" x 0.560" x 0.085" (model S03A1870N1) and 0.50" x 1.00" x 0.16" (model S03B1870N2). Delivery: stock to five weeks.
RF Power Components Inc.,
(516) 563-5050, ext. 225.
75 W Programmable Attenuator
The model 3250 1 W programmable attenuator is designed for wireless, PCS, cellular and modem test applications, and is available with an optional TTL interface/driver or SmartStep circuitry. Specifications include a nominal impedance of 75 W, frequency range of DC to 1 GHz, SWR of 1.2 from DC to 0.5 GHz and 1.3 from 0.5 to 1 GHz, and insertion loss of 2.25 dB from DC to 0.5 GHz and 4.75 dB from 0.5 to 1 GHz. The attenuator operates over a temperature range from –40° to +70°C.
(800) 638-2048 or (301) 831-4701.
Low Frequency, High Power Directional Couplers
These low frequency, high power directional couplers offer accurate coupling, low insertion loss and high directivity in a compact package. The standard units are optimized for octave bandwidths and are available with a choice of coupling values (20 or 30 dB). The units are designed for sampling power with a negligible effect on the transmission line and very low intermodulation products. The couplers operate from 250 to 1000 MHz with directivity of 25 dB (min) and SWR of 1.15 (max). In addition, intermodulation is better than –130 dBc and impedance is 50 W. Connectors are SMA female.
RLC Electronics Inc.,
Mt. Kisco, NY
Two-way Power Divider
The model DL 208F two-way power divider operates over the 20 to 2000 MHz frequency range with an insertion loss of 1.25 dB (max). Additional specifications include isolation of 20 dB (min), SWR of 1.5 (max), amplitude balance of 0.4 dB, phase balance of 3° (max) and input power of 5 W. The connectors are SMA. Price: $179 each for less than 10 units. Delivery: stock to six weeks.
Technical Research and Manufacturing Inc. (TRM),
Six-bit Digital Phase Shifter
The model DPS660.9-90HPA six-bit, switched-line phase shifter features a phase range of 0° to 90° in 1.4° steps. Centered at 915 MHz, it has an operating bandwidth of 200 MHz, phase accuracy of +/-1° and a linear phase vs. frequency response. The unit handles RF power of 150 W peak, 30 W average with an insertion loss of 1.2 dB maximum, 1 dB typical and SWR of 1.4 (max). Phase control is binary TTL with switching time of less than 1 ms. DC power is +/-5 V/330 mA and –125 V/15 mA. The phase shifter has SMA female connectors and a DA-15P for DC and TTL connections. Size: 4.15" x 2.75" x 1.00".
Vectronics Microwave Corp.,
Directional Couplers and Hybrids
These couplers and hybrids are available in a wide selection from small signal to custom-made high powers. The units operate over the 0.25 to 18 GHz frequency range in octave or multi-octave bands and feature low loss, high directivity and low frequency sensitivity.
Universal Microwave Components Corp. (UMCC),
WLAN SAW Filters
The models TFH325A and TFH240A surface acoustic wave (SAW) filters are fully compliant with IEEE 802.11 for 2.4 GHz WLAN applications and provide good insertion loss with a low group delay variation. Center frequencies of 240 and 325 MHz are available with 2 Mbps data rates. The units are packaged in a 7 x 5 mm leadless chip carrier.
Ultra-miniature Trimmer Capacitors
The JS series ultra-miniature, surface-mount chip size trimmer capacitors offer a new 0.4 to 1 pF range. With a self resonant frequency at 4 GHz, the capacitors are suitable for use in telecommunications applications. High stability also allows the capacitors to be used in frequency oscillator applications. Price: 60¢ in production quantities.
Miniature SP6T Switch
The model MSN-6DR/DT-05 miniature SP6T switch covers the frequency band of 0.5 to 18 GHz and is available in either reflective or absorptive versions. Features include an insertion loss of 3.5 dB (max), SWR of 2 (max), isolation of 60 dB (min) at 2 GHz and 70 dB (min) at 18 GHz, and switching speed of 75 ns (typ) for both delay on and delay off. Power supplies are +/-5 V with a positive current draw of 300 mA (max) and a negative current draw of 75 mA (max). Control is TTL compatible. Size: 3.0" x 1.5" x 0.4".
American Microwave Corp.,