Cloverleaf Antennas Reach 2.5 GHz
A line of compact circularly-polarized antennas is available for use from 1.98 to 2.20 GHz, as well as for 2.30 to 2.50 GHz for military and commercial applications. The rugged Turbo Cloverleaf family of antennas features components in the classic cloverleaf radome style with omnidirectional radiation patterns. The radome enclosure measures just 2 in. on a side for ease of colocation. The antennas also have integrated 3-in. coaxial gooseneck assemblies with nonrotating RF connectors, SMA connectors for the lower-frequency units and TNC connectors for the higher-frequency antennas. The waterproof antennas are available with left-handed circular polarization (LHCP) and right-handed circular polarization (RHCP) with more than 40 dB isolation between antennas with the different polarizations. As an example, model 1032-021 operates from 1.98 to 2.20 GHz with RHCP (model 1032-022 for LHCP) with 1.2 dBi gain and a black chrome male SMA connector. Model 1032-024 operates from 2.3 to 2.5 GHz with RHCP (model 1032-025 with LHCP) with 1.2 dBi gain and a black chrome TNC connector.
Southwest Antennas, 8145 Ronson Rd., Ste. B, San Diego, CA 92111; (858) 277-3300, e-mail [email protected], www.southwestantennas.com
Miniature Signal Generator Spans 6 to 18 GHz
Model LMS-183DX is a Lab Brick compact modular signal generator with a frequency range of 6 to 18 GHz. It provides output level control from +10 to -70 dBm 6 to 13 GHz and from +10 to -55 dBm from 13 to 18 GHz. It weighs less than 1 lb and measures 4.90 x 3.14 x 1.59 in. (124 x 80 x 40 mm) with maximum harmonics of -25 dBc. The signal generator, which performs phase-continuous frequency sweeps, is controlled and powered by means of a Universal Serial Bus (USB) connector. P&A: $3499; 3 weeks.
Vaunix Technology Corp., 7 New Pasture Rd., Newburyport, MA 01950; (978) 662-7839, e-mail: [email protected], www.vaunix.com
Rack-Mount Amplifier Powers 6 to 18 GHz
Solid-state Class AB linear amplifier model BHE69189-50 delivers 50 W of clean output power from 6 to 18 GHz. Suitable for test and systems applications, the rack-mountable amplifier provides more than 40 W output power into a load with 2.0:1 VSWR while achieving 45-dB typical gain. Second and third harmonics are less than -12 and -22 dBc, respectively, while spurious levels are better than -60 dBc. The amplifier, which is open/short tested, runs on ac supplies of 85 to 265 V. It measures 19.0 x 22.0 x 5.25 in. with Type N female connections (and options for TNC and SMA connectors). The amplifier is designed for operating temperatures from -20 to +50°C and weighs 40 lb.
Comtech PST, 105 Baylis Rd., Melville, NY 11747; (631) 777-8900, www.comtechpst.com
Power Dividers Cover Multiple Bands to 6 GHz
A line of RF/microwave power dividers has been extended with the addition of broadband models operating from UHF through ISM bands. Models in the 80X-X-3.250WWP line are available with Type N and SMA connectors in 2-, 4-, 8-, 16-, and 32-way configurations with performance optimized for use from 500 MHz to 6 GHz and at power levels of 30 W and more. The rugged components are IP67-rated for indoor and outdoor use. Models are also available with BNC and TNC coaxial connectors.
MECA Electronics, Inc., Denville, NJ 07834; (866) 444-6322, e-mail: [email protected], www.e-MECA.com
Bidirectional Amplifier Handles 1350 to 1390 MHz
Triad RF Systems.
Model TTRM1081 is a bidirectional amplifier capable of boosting receive and transmit signals from 1,350 to 1,390 MHz. The L-band unit is designed with power amplifier (PA) and low-noise-amplifier (LNA) circuits in the same compact housing; it is suitable for communications applications in unmanned aerial vehicles (UAVs) and military mesh networks. It provides typical output power of +43 dBm at 1-dB compression and typical saturated output power of +44 dBm. The typical transmit gain is 25 dB and the typical receive gain 10 dB. The LNA noise figure is typically 2 dB. The switching speed between receive and transmit amplification is typically 1 μs. The amplifier runs on voltages of +27 to +30 V dc and measures 3.33 x 2.69 x 0.65 in.
Triad RF Systems, 180 Tices Ln., Bldg. A, Ste. 107, East Brunswick, NJ 08816;
(855) 558-1001 e-mail: [email protected], www.triadrf.com
GaAs MMIC Amplifiers Minimize Noise to 22 GHz
The latest additions to the BroadRange line of distributed amplifiers are models CMD240 and CMD241, covering frequency ranges of DC to 22 GHz and 2 to 22 GHz, respectively. Both feature positive gain slopes to eliminate the need for equalization. Model CMD240 offers 15-dB gain with midband noise figure of 2.2 dB. It achieves +19 dBm output power at 1-dB compression and +28 dBm output power at 3-dB compression, when tested at 10 GHz. It draws 80 mA at +5 V dc. Model CMD240 has 13-dB gain with midband noise figure of 2.3 dB. It provides +28 dBm output power at 3-dB compression and can handle RF input power levels as high as +20 dBm. It draws 74 mA current from a +5 V dc supply. The 50-Ω GaAs monolithic microwave integrated circuits (MMICs) operate on supplies from +3 to +8 V dc and are well suited for instrumentation and communications circuits. They are available now as chips and will be offered soon in QFN packages.
Custom MMIC, 300 Apollo Dr., Chelmsford, MA 01824; (978) 467-4290, www.custommmic.com
VCOs Tune from 10 MHz to 11 GHz
Covering bands from 10 MHz to 11 GHz, a line of more than 60 models of voltage-controlled oscillators (VCOs) is available from stock for immediate shipping. The VCOs are designed to meet MIL-STD-202 environmental test conditions for shock, vibration, and temperature cycling and include models with phase-noise performance as good as -125 dBc/Hz offset 10 kHz from the carrier. They provide output power from 0 to +12.5 dBm and operating on voltages from 0 to +20 V dc. The oscillators are available in hermetic surface-mount-technology (SMT) packages with gold-plated mounting surfaces and can be used at operating temperatures from -40 to +85°C.
Fairview Microwave, 1130 Junction Dr., Ste. 100, Allen, TX 75013; (972) 649-6678; www.fairviewmicrowave.com