- Buyers Guide
The model 1604 wideband 16 input x four output monitoring switch features a 3 to 14.5 GHz bandwidth, which makes it versatile for monitoring RF signals in a wide range of applications. Insertion loss is 12 dB (max) and input-to-output isolation is 60 dB (min). Each output has a serial control port that is configurable for RS422 (default) or RS232C operation. The protocol allows each of the 16 inputs to be assigned a label of up to 17 characters. The switch also has a separate serial port (RS422 or RS232C selectable) that can be used for remote control. All RF input and output connectors are type N. SMA connectors are available as an option.
Carolina Microwave Inc.,
Magnetic SPDT Switch
The model 601-2308 SPDT switch with SMA connectors is a long-life, miniature (0.8" diameter x 1.5" height) magnetic unit that eliminates friction by using a magnetic linear solenoid. This design allows for a long life cycle capable of handling 80 W CW. The unit operates over the DC to 18 GHz frequency range with an SWR of 1.5 (max). Insertion loss is 0.50 dB (max) and isolation is 60 dB (min). Delivery: stock to six weeks.
Dow-Key Microwave Corp.,
Resistor Chip Arrays
The WCA and WCC series thick-film resistor chip arrays feature four isolated resistors in a square-cornered 3.2 x 1.6 mm termination array. The WCA is a convex configuration while the WCC is a concave configuration. The models WCA 0804 and WCC 0804 both measure 3.2 x 1.6 mm and feature four resistors with resistance values of 10 W to 1 MW, five percent tolerance and temperature coefficients of resistance of 200 pm/°C. The resistor chip arrays consist of four isolated thick-film resistive elements on a ceramic substrate with tin/lead solder wraparound terminations and a nickel barrier to prevent leaching. Price: approximately 3¢ each (5000). Delivery: stock to six weeks. Samples are available immediately.
International Resistive Company Inc. (IRC), Advanced Film Division,
Corpus Christi, TX
(888) 472-3282 or (512) 992-7900.
High Average Power Circulators
These high average power circulators are available for paging, cellular and communications applications. The model CT-1237-N circulator operates from 270 to 290 MHz at 250 W CW power with isolation of 20 dB (min), loss of 0.3 dB (max) and SWR of 1.20 (max). Power levels to 1.5 kW CW also are available. Type N connectors are standard.
UTE Microwave Inc.,
Asbury Park, NJ
500 MHz High-Q Diplexer
This high-Q diplexer designed for use in 500 MHz radios features a receive section with a 3 dB bandwidth of 5 MHz and rejection of 90 dB (min) on the transmit band. Insertion loss is 2 dB (max). The transmit section has a rejection of 60 dB (min) with an insertion loss of 1 dB (max). Transmit-to-receive spacing is 10 MHz. Size: 6.3" x 4.0" x 3.7".
Filtel Microwave Inc.,
Vaudreuil-Dorion, Quebec, Canada
Flexible Resistive Wire
The Fibreohm™ lightweight, flexible resistive wire is designed for isolating antennas and sensor probes from the fields they measure. The resistive wire can be used in telemetry and sensor systems, such as electromagnetic radiation hazard meters and robotic sensor systems. The wire is insulated and is available typically as 100 ft coils in three different resistances of approximately 600, 2800 and 12,000 W/in (235, 1100 and 4725 W/cm).
St. Louis, MO
The model BR665001 bandpass filter features a center frequency of 6500 MHz, insertion loss of 2 dB (max) and a 1 dB bandwidth of 40 MHz (fc +/-20 MHz). Insertion loss ripple is 0.2 dB (max) and return loss is greater than 15 dB over the 1 dB bandwidth. Additional features include group delay variation of less than 30 ns over the 1 dB bandwidth and rejection greater than 60 dBc at fc –65 MHz and fc +70 MHz, and greater than 70 dB from DC to fc –100 MHz and fc +100 MHz to 1.9 x fc. The bandpass filter operates from –30° to +70°C. Size: 0.75" x 1.50" x 6.50", excluding SMA female connectors.
Microwave Circuits Inc.,
(800) 642-2587 or (202) 829-3030.
The model JDC-10-4 directional coupler delivers 10.5 +/-0.5 dB nominal coupling with +/-0.6 dB flatness. The coupler covers the wide 5 to 1000 MHz frequency range in a 0.25" x 0.31" x 0.23" surface-mount package. Typical midband mainline loss is 1 dB, directivity is 23 dB (typ) and SWR is 1.15 (typ). Maximum power input is 1 W. Solder-plated J leads provide good solderability and strain relief, and tape-and-reel packaging is available for fast, automated assembly. Price: $14.95 each (qty. 1–9). Delivery: one-week (guaranteed).
Harmonic Quadrature Modulator
The DBE series quadrature modulator offers 50 dB carrier suppression for digital radio applications. This rejection is derived from a harmonic mixing approach that minimizes the phase degradation to less than 0.5° due to the carrier. Supporting output frequencies in bands from 5 to 15 GHz, the harmonic operation requires only half the LO frequency, reducing the cost of the phase-locked source. Typical conversion loss is 8.5 dB with the third harmonic suppressed an additional 23 dB.
Surface-mount Ceramic Chip Carriers and Packages
These chip-scale packages are designed for use in silicon and GaAs ICs, MMICs, RF power amplifiers and other devices. The ceramic chip carriers combine the company’s plated copper-on-ceramic technology with thick films (including resistors). Thermal and/or hermetic vias with plated-up heat spreaders ensure good thermal management. These ceramic packages carry multiple die, are wire bondable and can be provided in multi-image arrays. Products operate from –55° to +150°C. Operating in megahertz and gigahertz frequencies and meeting high speed switching requirements, these new ceramic packages serve as high density interconnect tools that are suited for meeting the growing demands of the RF, microwave and wireless communication markets.
Miniature Threshold Detector
The model TD-30-SHS-218 broadband, ultra-high speed (£ 6 ns) miniature threshold detector operates from 2 to 18 GHz with a –20 to +10 dBm dynamic range. The unit has a high speed propagation delay of 4 ns (typ) (6 ns (max)) and a threshold variation of +/-0.5 dB over the frequency range for any 1 GHz window. SWR is 3 at –20 dBm. Power supplies (no load) are +/-15 V DC at +/-50 mA (typ) (+/-100 mA (max)). The unit is available with either an ECL or TTL output. Size: 2.2" x 1.5" x 0.4". Other sizes, dynamic ranges and frequencies are available.
Planar Monolithics Industries Inc.,
The model 2A4NY medium-power isolator is designed for applications in the 3.4 to 4.2 GHz frequency band and offers adaptability with removable RF connectors. The unit has an SMA input and a type N output with typical loss of 0.3 dB and isolation greater than 20 dB. Small quantities are available from stock.
Renaissance Electronics Corp.,
7/16 DIN Right-angle Adapter
The model RFD-1658-2 7/16 right-angle adapter is constructed of machined brass and beryllium copper female contacts, and Teflon™ insulation. The female-to-female barrel adapter also is available for immediate shipping. All of the company’s 7/16 DIN connectors and adapters are silver plated for minimized intermodulation distortion.
RF Connectors, a division of RF Industries,
San Diego, CA
(800) 233-1728 or (619) 549-6340.
Two- and Four-way 50 W Combiners/Dividers
The models RFP-4309 and RFP-4310 in-phase combiners/dividers cover the full 800 to 2100 MHz range with typical insertion loss of less than 0.3 dB and minimum isolation of 20 dB. The model RFP-4309 measures 2.10" x 1.50" x 0.44" and is equipped with standard SMA connectors. The model RFP-4310 measures 3.250" x 2.000" x 0.775" and offers standard type SMA and N connections. Delivery: stock to five weeks.
RF Power Components Inc.,
30 dB Dual Directional Coupler
The model FC6172-1 dual directional coupler is designed for power monitoring and SWR sampling in telecommunications base stations and operates over the 1805 to 1990 MHz frequency range. It offers a maximum insertion loss of 0.2 dB and SWR of 1.10 (max) primary and 1.20 secondary. Directivity is 30 dB and average power handling is 120 W. Size: 2.53" x 2.50" x 1.20" not including SMA female (coupled) and type N female (main) connectors.
Sage Laboratories Inc.,
Miniature Semirigid Assemblies
These miniature semirigid assemblies developed for complex designs feature accuracy ensured by means of computerized forming and processing equipment. Diameters range from 0.034" to 0.085". Semirigid microporous cables also are available in diameters ranging from 0.047" to 0.500". All high performance semirigid products feature a dielectric that delivers good phase vs. temperature characteristics, high power handling, stable SWR and a loss reduction of up to 33 percent over conventional solid Teflon cables. Phase and amplitude matching is available.
Storm Products, Advanced Technology Group,
(888) 347-8676 or (630) 323-9121.
7-16 RF Coaxial Adapters
These 7-16 in-series adapters feature male-female right-angle types and T adapters that allow easy direction changes for straight cable runs, eliminate the need for redesigning cables and save space. Between-series compatibility problems are solved by adapters that connect 7-16 to type N, SQ and SC, or 7/8- and 1-5/8 EIA connectors in various gender combinations. Providing ratings up to 2700 V RMS, the adapters conform to DIN 47223, IEC 169-4, VG 95250 and CEEC 22 190 specifications. The 50 W adapters are constructed with nickel- or silver-plated brass bodies, silver-plated beryllium-copper female contacts and silver- or gold-plated brass male contacts. Applications include cellular base stations.
High Power Ferrite Circulators and Isolators
Lower spin-wave and I2R loss has enabled the company to produce this line of low loss isolators and circulators. The model U 882 DCCW circulator operates from 849 to 914 MHz with only 0.25 dB insertion loss, –83 dBc intermodulation distortion, 80 W average and 800 W peak power dissipation over the 0° to +70°C temperature range. These devices are designed for use in Global System for Mobile (GSM) cellular bands with feed-forward power amplifiers. The intermodulation characteristics have been measured with 25 W tones.
Southern Microwave Inc.,
Boynton Beach, FL
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