DTO Handles 2 To 18 GHz
Model DTO-2G18G-CD-1 is a digitally controlled oscillator (DTO) for applications from 2 to 18 GHz. It achieves worst-case tuning accuracy of ±2 MHz at room temperature with minimum tuning step size of 0.5 MHz. The DTO delivers +10 dBm output power with ±3-dB flatness across frequency and temperature. It provides a minimum modulation bandwidth of DC to 9 MHz, with typical harmonic levels of -20 dBc and typical spurious signal levels of -55 dBc. The single-sideband (SSB) phase noise is -80 dBc/Hz offset 100 kHz from the carrier. The DTO, which is designed to withstand stringent military ground or airborne environments, achieves ±0.1 MHz/°C frequency drift with temperature. It exhibits ±1 MHz maximum pulling into a 2.0:1 VSWR load with±500 kHz/V maximum pushing. The signal source handles operating temperatures of -40 to +70°C and runs on power supplies of +15, -15, +5, and +28 VDC. Planar Monolithics Industries, 7311-F Grove Rd., Frederick, MD 21704; (301) 662-5019, FAX: (301) 662-1731, e-mail: [email protected], www.pmi-rf.com.
Cable-Based Antennas Aid Airborne Wireless
A new line of cable-based antennas, also known as leaky feeder lines, has been developed to simplify the installation of airplane-based wireless communications systems. Ideal for both wide-body and single-aisle passenger aircraft, GORE® Cable-Based Antennas provide reliable access to different wireless protocols. They are easily installed along the length of the cabin ceiling. With signal propagation occurring every meter along the antenna, passengers are assured reliable access, regardless of their location in the cabin. The leaky antennas support frequencies from 0.4 to 6.0 GHz for a wide range of wireless standards, including Bluetooth, DECT, DECT2, Global Star, GSM, IRIDIUM satellite communications (satcom), MMS, PDC, TETRA, UMTS, WLAN 802.11 a/b/g, and WiMAX. Available in lengths of more than 65 m, they require no maintenance for the lifetime of the aircraft. They meet all applicable aircraft shock, vibration, and fire specifications, including AirBus ABD0031 and FAR Part 25.1359(d). WL Gore & Associates, Inc., 380 Starr Rd., Landenberg, PA 19350-9221; (610) 268-1915, www.gore.com.
Switch Matrix Controls 18 GHz
For measurement and other critical signal-routing chores, the model USB-8SPDT-A18 Universal-Serial-Bus (USB) switch matrix provides a combination of high performance, versatility, and extremely long operating lifetime. Rated for 100 million switching cycles, the switch matrix consists of eight single-pole, double-throw (SPDT) electromechanical absorptive failsafe switches each with 85-dB typical isolation. Designed for applications from DC to 18 GHz, the unit can handle 10 W input power with low insertion loss per switch of typically 0.15 dB through 8 GHz and 0.30 dB through 18 GHz. It features low VSWR of typically 1.25:1 or less from DC to 18 GHz, with typical switching speed of 25 ms.
The eight switches can be configured as a single-pole, nine-throw (SP9T) switch, as a 2 x 8 switch, a single-pole, five-throw (SP5T) switch and a transfer switch, two transfer switches, and various other configurations. It is built into a rugged metal case measuring 4.5 x 12.0 x 2.25 in. with 24 female SMA connectors, a 2.1-mm DC socket, and a USB type B port. The switch includes a compact disc (CD) with graphical user interface (GUI) software and various other accessories. The switch matrix operates on +24 VDC; a +24-VDC power adapter is included. The included software runs on 32/64-b Windows and Linux operating systems as well as LabVIEW®, Delphi®, C++, C#, Visual Basic®, and .NET software. Mini-Circuits, P.O. Box 350166, Brooklyn, NY 11235-0003; (718) 934-4500, FAX: (718) 332-4661, www.minicircuits.com.
Cable Assemblies Help Cut Losses
The SRX™ line of cable assemblies is engineered for low levels of passive intermodulation (PIM). The cables are suitable for RF/microwave applications at power levels to 150 W through 2.5 GHz depending upon the type of cable. They can be constructed with flexible-141, conformable-141, and semi-rigid RG-402 cables, with typical attenuation of 22 dB per 100 ft. Interconnect options include SMA, N, 7/16, and TNC connectors. Based on TCOM-240TM cable, these assemblies support power levels to 160 W at 2.5 GHz with attenuation of 13 dB per 100 ft. and offer a bend radius of 2.5 in. These assemblies handle operating temperatures to +85°C and deliver PIM performance of -155 dBc. For flame-retardant requirements, SRX assemblies employ TCOM-240-FR cables, while for plenum-rated installations, assemblies feature SFT-205TM cables with a temperature rating to +165°C. Performance is also stable with vibration within a 2 dB window. San-tron, Inc., 4 Turnpike Rd., Ipswitch, MA 01938; (978) 356-1585, FAX: (978) 356-1573, e-mail: [email protected], www.santron.com.
Amplifier Drives 50 To 1500 MHz
Model TQP7M9106 is a driver amplifier developed by TriQuint Semiconductor and available now from RFMW Ltd. Suitable for general-purpose applications from 50 to 1500 MHz, the driver amplifier delivers +33-dBm (2-W) output power at 1-dB compression at 900 MHz while drawing 455 mA current from a +5-VDC supply. Supplied in a standard 4 x 4 mm QFN package, the driver amplifier achieves 20.8-dB gain at 0.9 GHz with an output third-order intercept point of +50 dBm. It includes on-chip electrostatic-discharge (ESD) protection for a robust Class 1C HBM ESD rating. It also boasts RF overdrive protection. Internal active bias allows the amplifier to run from a +5-VDC supply but also provides DC overvoltage protection. Stocking distributor RFMW Ltd. also announced design and sales support for the model TQP7M9105 high-linearity amplifier from TriQuint, which is supplied in an SOT-89 housing. It provides better than 19 dB gain from 50 to 1500 MHz while drawing only 220 mA current from a +5-VDC supply. It achieves +49 dBm output third-order intercept point for high-linearity applications. RFMW Ltd., 90 Great Oaks Blvd., Ste. 107, San Jose, CA 95119; (408) 414-1450, FAX: (408) 414-1461, www.rfmw.com.
Low-Noise Device Serves UHF To 6 GHz
Renesas Electronics and California Eastern Laboratories (CEL) have announced the availability of a new silicon-germanium-on-carbon (SiGe:C) low-noise transistor suitable for applications through 6 GHz. Model NESG7030M04 is fabricated with Renesas’ SiGe:C semiconductor process, which boasts a transition frequency of 100 GHz. The transistor, which is available in a RoHS-compliant flat-lead M04 (SOT-343F style) package, delivers a noise figure of only 0.75 dB at 5.8 GHz with associated gain of 14 dB. It operates on a supply of 5 mA at +2 VDC. It can be supplied in bulk and tape-and-reel formats. P&A: $0.35 each, 100,000 qty. California Eastern Laboratories, 4590 Patrick Henry Dr., Santa Clara, CA 95054-1817; (408) 919-2500, FAX: (408) 988-0279, e-mail: [email protected], www.cel.com.
GaN Power Amp Extends To 6 GHz
Model SSPA 0.020-6.000-35 is a high-power gallium-nitride (GaN) amplifier with 50-dB typical large-signal gain from 20 MHz to 6 GHz. Suitable for military as well as commercial applications, the amplifier boasts typical saturated output power of 35 W at room temperature, from a package measuring about 2.5 x 7.7 x 1.4 in. The typical noise figure is 10 dB at room temperature. The typical input/output VSWR is 2.0:1. The amplifier operates from a +28-VDC supply. The power flatness across the band is typically ±3.0 dB with a typical power of 80 W at 800 MHz and 20 W at 6 GHz. The power amplifier includes an external DC blanking command that enables and disables the module in 25.0 μs or less. Input/output RF connectors are SMA female. DC and command voltages are accessible via a DSUB connector. Aethercomm, Inc., 3205 Lionshead Ave., Carlsbad, CA 92010; (760) 208-6002, FAX: (760) 208-6059, www.aethercomm.com.
Gunn Oscillator Tunes At F-Band
ModelSOM-10401317-08-S1 is a free-running F-band (90 to 140 GHz) Gunn oscillator with output power +17 dBm and mechanically tuning bandwidth of ±0.5 GHz. Mechanical tuning is accomplished via a self-locking tuning screw or micrometer. The oscillator operates with typically 750 mA current at +4.5 VDC. An optional heater can be installed to further improve the temperature performance with a single bias at +10 VDC to supply heating power to 5 W. Other members of the mechanically tuned Gunn oscillator family provide coverage of Ka, Q, U, V, E, and W-band frequencies. SAGE Millimeter, Inc., 3043 Kashiwa St., Torrance, CA 90505; (424)-757-0168; FAX: (424)-757-0188, www.sagemillimeter.com.
LNA Front End Handles 12 To 15 GHz
Model AMFW-7S-12001500-95 is a waveguide-based, low-noise-amplifier (LNA), weather-proof Ku-band waveguide front end operating from 12 to 15 GHz. It includes a pressure-sealed WR75 waveguide input and SMA female output connector. The front end is sealed within a rugged aluminum alloy housing. It includes reverse voltage, over current, and over temperature protection in addition to full internal regulation.
The total weight is about 600 g with dimensions of 4.92 x 2.66 x 1.50 in. It has a typical noise temperature of 95 K and is capable of at least +10 dBm output power at 1-dB compression across the full frequency band, with an option for +20 dBm. It has input/output VSWR of 2.0:1. The typical small-signal gain is 55 dB with 3-dB peak-to-peak gain flatness and maximum gain ripple of 0.4 dB/40 MHz within the operating band. Gain variations with temperature are less than 0.08 dB/°C. The unit draws 150 mA current from a single +12 to +24 VDC supply. MITEQ, Inc. 100 Davids Dr., Hauppauge, NY 11788: (631) 436-7400, FAX: (631) 436-7430, www.miteq.com.
Power Devices Gain 941 MHz
Richardson RFPD has announced immediate availability and full design support for two new laterally diffused metal oxide semiconductor (LDMOS) power transistors from Freescale Semiconductor, models AFT05MS031N and AFT09MS031N. The Airfast RF power products are designed for voice, video, and data services for first responders through the deployment of Long-Term-Evolution (LTE) cellular networks, as well as the interoperability of Project 25 (P25). The unmatched 12-V devices are designed for use in the VHF and UHF frequency bands from 136 to 941 MHz. They can operate into load VSWRs as severe as 65.0:1 under overvoltage and 3-dB overdrive conditions. Model AFT05MS031N operates from 136 to 520 MHz with 31 W output power and better than 70% efficiency, requiring less than 0.5-W drive level to achieve the rated output level. Model AFT09MS031N is designed for use from 764 to 941 MHz with more than 31 W output power. It requires less than 0.6-W input drive level to reach its rated output level. Richardson RFPD Sales, 40W267 Keslinger Rd., P.O. Box 307, LaFox, IL 60147-0307; (630) 208-2700, FAX: (630) 208-2662, e-mail: [email protected], www.richardsonrfpd.com.