Waveguide Variable Attenuators Pad 110 GHz
Image courtesy of Fairview.
A line of waveguide variable attenuators provides variable attenuation from 0 to 30 dB at Q-, U-, V-, and W-band frequencies. The product line includes five models covering 33 to 110 GHz suitable for applications in aerospace, defense, test, and telecommunications systems. The attenuators control insertion loss to 0.5 to 1.0 dB and maintain flat attenuation across frequency with each attenuation setting.
Fairview Microwave, 1130 Junction Dr., #100, Allen, TX 75013; (972) 649-6678; www.fairviewmicrowave.com
Switch Controls 5 to 2000 MHz
Image courtesy of Mini Circuits.
Model JSW4-23DR-75+ is a compact 75-Ω single-pole, four-throw switch with built-in CMOS driver well-suited for cable-television (CATV) and test system applications from 5 to 2000 MHz. It handles 3 W power at 0.1-dB compression with low insertion loss of typically 0.7 dB at 1 GHz. The switch measures 2 × 2 × 0.55 mm in a 14-lead package with only 40 μ A typical current consumption from a single supply of +2.5 to +4.8 V dc. The tiny SP4T switch achieves 38-dB typical isolation at 1 GHz and has a typical third-order intercept point of +59 dBm at 1 GHz.
Mini-Circuits, P.O. Box 350166, Brooklyn, NY 11235-003; (718) 934-4500; www.minicircuits.com
Power Amp Module Pushes 50 W to 18 GHz
Image courtesy of Comtech.
Broadband power amplifier module model BME69189-50 boasts 50 W or more output power from 6 to 18 GHz. The Class AB linear amplifier module has an RF input overdrive level of +10 dBm and typical gain is 47 dB. The gain flatness is ±4 dB at 40 W output power with output load VSWR of 2.0:1 at full power. The linear amplifier module exhibits low noise, with better than -60 dBc spurious content, better than -15 dBc second harmonics, and better than -25 dBc third harmonics. The noise power output is -105 dBm/Hz. The amplifier module achieves DC-to-RF efficiency of typically 14% or more from a +28 V dc supply, with less than 15 W power consumption in standby mode. It requires less than 1 μs under TTL control to switch on from standby mode. The compact amplifier module is equipped with a 7-pin Combo D dc/control connector and field-replaceable female SMA input and output connectors. It measures 6.56 × 3.50 × 0.84 in., weighs 1.5 lbs., and handles operating temperatures from -40 to +55°C.
Comtech PST, 105 Baylis Rd., Melville, NY 11747; (631) 777-8900; www.comtechpst.com
High-Power Attenuators Trim PIM to 2700 MHz
Image courtesy of Meca Electronics.
Attenuators designed for high power levels in cellular/wireless communications systems also limit passive intermodulation (PIM) levels. With numerous models capable of handling 50 or 100 W power, these attenuators are available with within-series and between-series 4.1/9.5, 4.3/10.0, 7/16 DIN, and Type N connectors for applications from 698 to 2700 MHz. The attenuators, which operate at temperatures to +85°C, are specified for PIM levels of typically -160 dBc. They are tested by means of 2 20-W test tones at room temperature.
Meca Electronics, Inc., 459 East Main St., Denville, NJ 07834; (973) 625-0733; www.e-MECA.com
LNA Drives GNSS and GPS Front Ends
Image courtesy of Skyworks.
Model SKY65605-21 is a monolithic microwave integrated circuit (MMIC) low-noise amplifier (LNA) suitable for Global Navigation Satellite System (GNSS) and Global Positioning System (GPS) receiver front-end applications. It offers 19 dB typical gain and 0.6 dB typical noise figure at 1575 MHz, with a typical input third-order intercept point (IIP3) of -5 dBm. The LNA, which is supplied in a 6-pin housing measuring 0.7 × 1.1 mm draws only 3.6 mA current from a voltage supply of +1.80 to +2.85 V dc.
Skyworks Solutions Inc., 20 Sylvan Rd., Woburn, MA 01801; (781) 376-3000; e-mail: [email protected], www.skyworksinc.com
Coupler Directs 2.6 to 7.0 GHz
Image courtesy of Mini Circuits.
Coaxial directional coupler model ZADC-13-73+ offers 13-dB coupling with flat coupling characteristics (±1.2 dB) from 2.6 to 7.0 GHz. It handles as much as 4 W CW input power with low mainline insertion loss of 0.8 dB and low VSWR of 1.20:1. Typical directivity is 18 dB. The rugged directional coupler is housed in an aluminum alloy case measuring just 2.0 × 2.0 × 0.75 in. with SMA connectors. The RoHS-compliant coupler can pass as much as 1 A dc current and is designed for operating temperatures from -55 to +100°C.
Mini-Circuits, P. O. Box 350166, Brooklyn, NY 11235-003; (718) 934-4500; www.minicircuits.com
SMT Synthesizer Tunes 4320 to 4930 MHz
Image courtesy of Synergy Microwave.
Model MFSH432493-100 is a low-noise frequency synthesizer in a compact, surface-mount-technology (SMT), RoHS-compliant package measuring just 0.6 × 0.6 × 0.175 in. Designed for use from 4320 to 4930 MHz, the synthesizer tunes in 1-MHz steps with 3-ms typical settling time. It provides +5 dBm minimum output power with typical spurious levels of -65 dBc and typical harmonic levels of -45 dBc. The phase noise is controlled to -85 dBc/Hz offset 10 kHz from the carrier and -102 dBc/Hz offset 100 kHz from the carrier. Based on the firm’s patented REL-PRO technology, the miniature frequency synthesizer locks to an external 10-MHz frequency reference source. It operates at temperatures from -40 to +85°C.
Synergy Microwave Corp., 201 McLean Blvd., Paterson, NJ 07504; (973) 881-8361; e-mail: [email protected], www.synergymwave.com