- Buyers Guide
Military Microwaves Supplement
The CCDP-60 series PCS duplexers are designed to offer greater rejection while achieving less than 0.8 dB of insertion loss in a small package. The units are factory tunable to any of the PCS or DCS bands and feature rejection of 80 dB and return loss of greater than 15 dB. Size: 4.13" x 2.00" x 1.38".
ClearComm Technologies Inc.,
Wideband RF Transformers
The TTWB series surface-mount wideband RF transformers are available with five different impedance ratios (1:1, 1.5:1, 2:1, 4:1 and 16:1) in both tapped and untapped configurations. The transformers are housed in a flat-top ceramic case measuring 0.25" x 0.25" x 0.19". Insertion loss is less than 0.5 dB and styles are available with 3 dB bandwidths of up to 0.100 to 1500 MHz. Price: 80¢ each (10,000). Delivery: stock.
These aluminum nitride substrate flange-mount terminations are designed as an alternative to beryllium oxide. The high power units are available in power levels from 10 to 60 W and frequencies to 4 GHz. Package sizes vary with power handling.
Florida RF Labs Inc.,
S-band Four-horn Combiner/Divider
The model LA100-207 S-band (WR430) four-horn combiner/divider is designed for satellite uplink communications. This design features an input magic tee with integral high power load, waveguide plumbing with fabricated E and H bends, two output tees with integral H bends on colinear arms and high power loads. The unit features four inphase outputs. The complete assembly is mounted on a common flange. Specifications include a transmit frequency of 1.75 to 1.85 GHz, receive frequency of 2.20 to 2.30 GHz, insertion loss of less than 0.25 dB, SWR of less than 1.2, phase balance of +/-2° and amplitude balance of +/-0.2 dB.
Microwave Engineering Corp. (MEC),
North Andover, MA
Ceramic Dielectric Resonators
These ceramic dielectric resonators are available in frequency ranges covering L- through Ka-band with dielectric constants from 20 to 80. The units are suitable for base station applications, including Advanced Mobile Phone System (AMPS), Global System for Mobile communications (GSM), PCS and PCN. Delivery: six to 12 weeks.
Tunable Bandpass Cavity Filter
The model 3FVSP-3300/3800-O/O tunable bandpass cavity filter has a tuning range from 3300 to 3800 MHz for digital radio applications. The unit has a 0.25 dB bandwidth of 25 MHz (+/-12.5 MHz). In the passband, insertion loss is less than 1.5 dB, return loss is 22 dB and stopband rejection is 20 dB at +/-140 MHz from f0. Price: $55 (1000). Delivery: stock to three weeks.
K&L Microwave Inc.,
Wireless Base Station Delay Lines
The LL series delay lines are designed for wireless base stations and are typically configured with circular coils that allow connectors to be located easily through relaxation of the coil. This method reduces manufacturing cost and complexity by eliminating the need for invasive length-compensating service loops. The assembly has a low loss microporous polytetrafluoroethylene dielectric with high electrical stability and eliminates the need to compensate within the system for changes in electrical phase length. The units operate from DC to 26.5 GHz and are available for typical base station applications from 800 MHz to 2.5 GHz. Typical delay times range from 15 to 75 ns and phase stability is maintained from 0° to +80°C. The units are available with SMA, MCX, 2MCX, GPO and other connectors in cable diameters of 0.047" to 0.250".
High Power Cellular Combiner
The model AY-F05S combiner can combine four 70 W (avg) power transmitter channels at any frequency in the band into a single antenna. The combiner operates from 851 to 866 MHz and makes it easier to reconfigure transmitters and antennas in base station systems to increase capacity. Designed for either CDMA or TDMA applications, the unit features high isolation of 65 dB between transmitter (input) channels and 55 dB (min) from the antenna (output) port to any transmitter input port. Filtering is also included to provide second harmonic rejection of at least 55 dB over the 1702 to 1732 MHz frequency range. In addition, insertion loss is 7 dB (max) and dissipated power is internally absorbed and convection cooled with a large finned area. Channel separation is 25 kHz. The combiner is designed to handle 300 W (peak) with 60 W CW reflected power from the antenna port. Size: 2.2" x 10.1" x 7.1".
(973) 887-8100, ext. 500.
10 dB Fixed Attenuator
The model NAT-10-60 low cost, semiprecision fixed attenuator operates from DC to 6000 MHz. With a power rating of 225 mW, the device offers a 10 dB +/-0.2 (nom) attenuator value with 0.9 dB (max) midband flatness. Midband SWR is 1.2 (max). The unit is housed in a rugged metal case with type N male/female connectors and can be used in –55° to +100°C (max) temperature environments for power leveling and impedance-match improvement. Price $26.95 (1–9). Delivery: one week.
The model FC6266-1 dual-band coupler operates over the 800 to 2200 MHz frequency range and provides insertion loss of 0.3 dB (max), SWR of 1.5 (max) and directivity of 20 dB. Average power handling is 50 W. Size: 3.5" x 0.9" x 0.5" (not including SMA female connectors).
Sage Laboratories Inc.,
The model CPLR001 directional coupler is designed for use in local multipoint distribution systems and Ka-band satellite communications. The unit operates in the 25 to 30 GHz frequency band, handling 30 W (avg) power. The unit delivers 10 dB (nom) coupling and maintains a minimum directivity of 12 dB. The low insertion loss of 2 dB and input and output SWR of 1.9 enhance the unit’s performance. Male or female 29 mm connectors are available.
Four-stage YIG Filter
The model M1823 dual four-stage bandpass yttrium iron garnet (YIG) filter operates from 2 to 8 GHz with low insertion loss of 3.5 dB per channel. The 3 dB bandwidth varies from 25 to 35 MHz and tuning sensitivity is 13 MHz/mA (typ) with an operating temperature of –55° to +85°C to MIL-E-5400 specifications. The unit can be integrated with an analog driver with 0 to 10 V control or 12 bit digital driver to tune the unit from 2 to 8 GHz. Size: 1.25" x 1.70" x 1.70".
Santa Clara, CA
3.7 - 4.2 GHz Filter
The model 12086 filter eliminates harmonic interference at the C-band receive antenna with a low loss of 0.05 dB to the 3.7 to 4.2 GHz passband. The filter installs between the feedhorn and low noise amplifier (LNA) to suppress the band of 5.925 to 6.425 GHz with a minimum rejection of 50 dB. The unit has an SWR of 1.08. Grooved flanges are standard but other connectors are available upon request.
Microwave Filter Co.,
East Syracuse, NY
(800) 448-1666 or (315) 438-4747.
Surface-mount Four-way Divider
The model P4-20-E4 surface-mount four-way power divider is designed to cover the PCS frequency bands. The unit provides an in-phase four-way split with 1.2 dB (max) insertion loss, 25 dB (min) isolation, 4° (max) phase balance and 0.5 dB (max) amplitude balance.
Pulsar Microwave Corp.,
Low Loss Cable
The model 421-701 helically wrapped cable offers lower loss, better shielding and improved amplitude and phase shift vs. flexure than comparable braided coax constructions. Typical attenuation is 161 dB/100' at the maximum frequency of 18 GHz. Impedance is 50 W +/-3, capacitance is 28.75 pF/ft and delay is 1.44 nS/ft. The cable has a jacket diameter of 0.065" and minimum bend radius of 0.200" (static) and 0.550" (dynamic). The unit is suitable for use in temperatures ranging from –50° to +125°C.
Storm Products Co.,
Surface-mount Bandpass Filters
The MBP series surface-mount bandpass filters operate from 10 to 2500 MHz and feature an SWR of 1.5, impedance of 50 W and phase linearity of +/-5°. The four-section model MBP-500-50-4-PB filter features a center frequency of 500 MHz and 50 MHz 3 dB bandwidth.
RLC Electronics Inc.,
Mt. Kisco, NY
Space-qualified Waveguide Diplexers
These space-qualified waveguide diplexers operate over the 3.4 to 4.2 GHz and 5.7 to 6.725 GHz bands with a WRD350 common port. The units provide more than 70 dB isolation between the WR229 and WR137 ports over the 3.4 to 4.2 GHz band and more than 50 dB isolation between these ports over the 5.7 to 6.725 GHz band. These high isolations are achieved with insertion losses of less than 0.15 dB between the common port and either the WR229 or WR137 ports over the appropriate bands.
Sierra Microwave Technology,
7/16 Coaxial Connectors
These DIN 7/16 coaxial connectors feature an exclusive dielectric bead made from a proprietary polyethylene compound that eliminates the potential for cold flowing (an inherent trait of PTFE dielectrics). The dielectric bead is encapsulated in a silver-plated brass banding that ensures a clearly defined electrical and mechanical reference plane (on the connector’s multiple internal junctions) when the connectors are mated and torqued properly (a requirement for good intermodulation performance).
Rosenberger of North America LLC,
RF Coaxial Connector Adapters
These RF coaxial adapters solve connectivity problems between series such as LC to BNC, LC to N, HN to N, SC to N, 7/16 to N, BNC to HN, N to UHF, BNC to UHF, SMA to N and QDS to BNC. Capable of mating virtually all types of incompatible plugs, jacks and receptacles, standard tooling exists for more than 100 different types of connectors. Manufactured to customer specifications, the units include lay-on-the-bench adapters provided without mounting hardware, panel-mounted versions, through bulkhead right-angle or straight-thru types and three- or four-way adapters.
0.5 - 4 GHz Directional Couplers
The models 1536RA, 1537RA, 1538RA and 1540RA directional couplers operate from 1 to 2 GHz, 2 to 4 GHz, 0.5 to 2 GHz and 1 to 4 GHz, respectively, feature high directivity of 20 dB and are conservatively rated to ensure reliable service and performance under several environmental conditions. The units operate from –55° to +85°C. The models 1536RA and 1538RA units feature an SWR of 1.2 (max), insertion loss above coupling loss of 0.2 dB and a frequency flatness of +/-0.75 dB.
(800) 638-2048 or (301) 831-4701.
1 kW UHV TV Circulators
The CT-1435-D series low loss, high power circulators are designed for digital television applications for 1 kW (avg) and 2.5 kW (peak) power levels. Coverage of the 470 to 806 MHz domestic UHF television bands is accomplished by three units optimized for 0.12 dB (max) loss, 20 dB (min) isolation and 1.2 (max) SWR. A fourth unit offers coverage to 860 MHz. Signal port connections are DIN 7/16 with type N as the reflected power (external load) port. Isolator versions are available with 125 W internal loads.
UTE Microwave Inc.,
Asbury Park, NJ
Surface-mount Trimmer Capacitor
The 513 VARI-Thin" series surface-mount trimmer capacitors can now be supplied on tape and reel for use with auto placement equipment. The units measure only 5 mm x 2 mm and provide capacitance ranges from 1 to 5 pF to 7 to 40 pF. Standard operating voltage is 100 V DC to –55° to +85°C. The ceramic base sits directly on the module substrates or circuit board with no mechanical or metal protrusions beneath the base plane. Price: ranges from 90¢ to $1.10 (1000). Delivery: stock to 12 weeks.
1.2 pF Multiturn Trimmer Capacitor
The A2 series multiturn precision trimmer capacitor replaces fragile, expensive sapphire trimmers and features a capacitance range of 0.3 to 1.2 pF, DC voltage of 250 V and DC withstanding voltage of 500 V. In addition, the temperature coefficient is 0 +/-150 ppm/°C from –65° to 125°C, Q is more than 1000 at 1 GHz and self-resonant frequency is more than 5 GHz. The patented solid dielectric design provides high reliability because plates cannot short. Tuning is linear over four full turns with positive stops at minimum and maximum capacitance. Price: $1.60 (100,000). Delivery: one week for samples and four weeks for more than 1000 pieces.
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