COMPONENTS
Current-controlled Variable Attenuators
The models AV101-12 and AV102-12 current-controlled variable attenuators (from the company's HIP3 series components) cover the 0.8 to 1 GHz and 1.7 to 2 GHz ranges, respectively, and are designed to meet the wide dynamic range required in spread spectrum wireless base station applications. The units feature a third-order intercept point (IP3) of +50 dBm, low loss of 1 dB (typ) attenuation of 30 dB and SWR of less than 1.5 (typ).
Alpha Industries,
Woburn, MA
(800) 290-7200, ext. 306 or (508) 628-4702, ext. 306.
SMR Duplexer
The model CCDP-59 specialized mobile radio (SMR) duplexer is custom designed for minimal insertion loss and high power handling capability. With less than 0.35 dB of insertion loss over 806 to 824 MHz and 851 to 867 MHz, the unit can handle over 1 kW of power. The device achieves greater than 70 dB of rejection in the adjacent band in a package size measuring 8.55" x 6.20" x 3.25".
ClearComm Technologies Inc.,
Salisbury, MD
(410) 860-0500.
GaAs Switches
These GaAs switches are designed to be pin-for-pin compatible with switches currently on the market. The model ITT239AB offers an isolation of 35 dB at 1 GHz and positive control capability in an SOIC-8 package. The model ITTC02AB SPDT nonreflective switch also features high isolation and positive control capability in an SOIC-8 package. The model ITT002AB SPDT nonreflective switch features very high isolation of 40 dB at 1 GHz in an SOIC-8 package. The model ITT106AJ SPDT reflective switch features positive control from +3 to +5 V and low insertion loss in a miniature MSOP-8 package. Finally, the model ITT130AK SPST switch (which is nonreflective at the J2 port) offers very high isolation of 41 dB at 1 GHz and positive control capability in a miniature SOT-6 package.
GaAsTEK division of ITT Industries Inc.,
Roanoke, VA
(540) 563-8665.
5.8 GHz Ceramic Filters
These 5.8 GHz ceramic filters are offered in two- to six-section packages for C-band applications. The model 3DT24-5768/x100 filter is designed for local positioning system applications and features an integrated clean-up circuit to provide a clean out-of-band response. The unit features a three-section Chebyshev design with an operating bandwidth of 100 MHz, insertion loss at fo of less than 3 dB and stopband rejection of -25 dBc out to 20 GHz. The leadless surface-mount package measures 0.55" x 0.80" x 0.20".
K&L Microwave Inc.,
Salisbury, MD
(410) 749-2424.
Flexible Microwave Cables
The models UFF-070D, UFF-092C, UFF-092D, UFF-147A and UFF-147B miniature, flexible microwave coaxial cables are designed as drop-in replacements for semirigid cables in a wide variety of applications. The units have electrical specifications that are nearly identical to semirigid cables to 18 GHz and often provide better thermal and phase stability because they employ a low density Teflon dielectric. The cables' flexibility allows them to be specified in a system without being included on electrical drawings. The cables accept popular industry connectors, including GPO and OSP. Outside diameters of 0.070", 0.092" and 0.147" can be specified.
MICRO-COAX,
Pottstown, PA
(800) 223-2629.
0.077" Mixers
The 50 to 1000 MHz ADE-12 series frequency mixers measure as low as 0.077" in height, allowing for smaller cellular, ISM and PCN product design. Rugged, all-welded construction and solder-plated leads provide increased reliability during reflow while the open-case design allows water wash to drain thoroughly. Specifications include midband conversion loss of 7 dB (typ), IP3 of +17 dBm and L-R isolation of 35 dB. Price: $2.95 each (10-49). Tape-and-reel packaging is available.
Mini-Circuits,
Brooklyn, NY
(718) 934-4500.
Press-in Coaxial Connectors
These press-in coaxial (solder-free) connectors are available in a variety of configurations, including eye of the needle and H press, providing good mechanical hold. The units accommodate several board thicknesses from 3 to 5 mm, and are available in all connector series, including DIN 41626, D-sub inserts and mini-coax (2 mm).
Rosenberger of North America LLC,
Lancaster, PA
(717) 290-8000.
I/Q Demodulator
The model MMX-IQD-1A-2.6G in-phase/quadrature (I/Q) demodulator consists of two stripline circuits (a power divider and quadrature hybrid), two MMIC mixers and two video amplifiers. The multilayer package provides a surface-mount interface and is suited for pick-and-place assembly. Specifications include a 2.1 to 3.2 GHz frequency range, conversion loss of 2 dB, amplitude balance of 0.5 dB, phase balance of 90° ±7°, LO return loss of 20 dB, RF return loss of 9 dB, I/Q bandwidth of DC to 50 MHz and an operating temperature range of -55° to +85°C. Size: 0.80" x 0.80" x 0.13". Weight: 0.127 oz.
Merrimac Industries Inc.,
West Caldwell, NJ
(888) 434-6636.
2 x 8 Dual-band Power Divider
The model FP6252-2 2 x 8 dual-band power divider operates over the 800 to 2100 MHz frequency range with an SWR of 1.2 (max), insertion loss of 1.1 dB (max) and isolation of 25 dB (min). In the 1700 to 2100 MHz range, SWR is 1.25 (max), insertion loss is 2.5 dB (max) and isolation is 17 dB (min). Average power handling is 1 W for both bands. Size: 4.6" x 4.4" x 0.4" (without SMA female connectors).
Sage Laboratories Inc.,
Natick, MA
(508) 653-0844.
High Power Directional and Dual-directional Couplers
These high power directional and dual-directional couplers feature 30 dB coupling values and span optimized frequency bandwidths in the 850 to 2000 MHz range, making them suitable for applications in high performance wireless systems. Average handling power is 500 W. Additional features include high directivity, low SWR and insertion loss, and good coupling flatness. Delivery: stock to two weeks.
Synergy Microwave Corp.,
Paterson, NJ
(973) 881-8800.
22 - 23 GHz Preselector
The model 12970 bandpass filter preselects frequencies in the 22 to 23 GHz range for point-to-point radio. The filter features a 1 dB relative bandwidth of 50 MHz (min). Insertion loss is 2 dB (max) at center frequency and rejection is 30 dB (min) ±150 MHz from the center frequency.
Microwave Filter Co.,
East Syracuse, NY
(800) 448-1666 or (315) 438-4747.
0.8 - 2.3 GHz Programmable Attenuators
The models 4216 and 4218 programmable attenuators are designed for use in wireless/cellular, RF simulation/emulation and communication test applications. The units are available in six- and eight-cell configurations, including 127 dB/1 dB steps, 63 dB/1 dB steps and 63.75 dB/0.25 dB steps. The attenuators feature a nominal impedance of 50 W, frequency range of 0.8 to 2.3 GHz, SWR of 1.5 (max) and nominal insertion loss of 2.8 and 4.9 dB for the model 4218 and 2.1 and 3.4 GHz for the model 4216 from 0.8 to 1 GHz and 1 to 2.3 GHz, respectively. In addition, the units offer an accuracy of ±0.3 dB or two percent, switching time of 5 ms and operating temperature range of 0° to +70°C.
Weinschel Corp.,
Frederick, MD
(800) 638-2048 or (301) 846-9222.