Ultralow-noise JCA amplifiers
A line of ultralow-noise JCA amplifiers from Endwave Defense Systems includes more than 20 new models available to cover many of the popular microwave frequency bands. Narrowband models can be optimized for sub 0.5 dB noise figures over 100 MHz to 200 MHz sub-bands, with broadband multi-octave noise figure performance less than 1 dB maximum for C-band frequencies and below. Higher-frequency models are available upon request.
This performance uses Endwave's JCA brand amplifier building blocks and incorporates proprietary matching techniques. In addition to low-noise characteristics, cost efficiencies have also been achieved due to minimal touch-and-tune time. The engineering approach also results in a variety of end-use advantages. They can be employed in narrowband situations, such as a GPS receiver, or in an electronic surveillance system, where several octaves of bandwidth may be necessary. As a result of their flexibility and ultra low-noise performance and reliability, they are useful when system engineers are looking to improve radar sensitivity, increase dynamic range, and lower reception thresholds.
Endwave Defense Systems
Host processor bridge
The PC109 host processor bridge from e2v is an extended-reliability version of the Tundra Tsi109 host bridge from Tundra Semiconductor. Following closely after the signing of an agreement between e2v and Tundra to provide system interconnect products for extended-reliability markets, the PC109 host bridge provides system interconnect between PowerPC processors, PCI peripherals and local memory. The PC109 is capable of supporting two processors connected through the MPX bus and is capable of operating at a bus speed up to 167 MHz (or up to 200 MHz when supporting a single processor).
The PC109 features a DDR2 memory controller supporting DDR2-400 devices. The 133 MHz PCI-X interface and the two Gigabit Ethernet ports offer a high data bandwidth. With its low level of active power and integrated features such as clock generation, DMA, interrupt controller, I2C, UART, the PC109 provides system designers with greater overall system performance and reduced system design complexity.
The PC109 host bridge for PowerPC is available for sampling in a 1023-ball flip-chip plastic BGA package. Production ramp-up is scheduled for the fourth quarter of 2006, and product qualification is to be completed in the first quarter of 2007.
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The FP-50 is a solarpowered LED illumination system from Carmanah. With the electronics, batteries and solar module enclosed as a compact, self-contained enclosure, the FP-50 can be installed quickly with minimal technical expertise. Several external LED luminaire options are available and the FP-50 can be configured to power more than one luminaire at the same time.
The FP-50 is ideal for general illumination applications, including area floodlighting, perimeter lighting, security lighting and sign lighting. The FP-50 provides reliable, high-performance lighting wherever it is required — quickly and without the costs associated with connecting to a grid-based power supply.
The FP-50 is configured to automatically turn on at dusk and off at dawn. Other operating profiles, such as motion sensor activation, are also available. Using Carmanah's MICROSOURCE energy management system (EMS), the FP-50 automatically adjusts its performance to ensure year-round reliability under nearly all types of weather and environmental conditions. For light output, the FP-50 uses LED-based luminaires; these fixtures are shockproof, vibration-proof, watertight and designed to operate for up to 100,000 hours (more than 20 years of daily operation) before replacement.
The FP-50 intelligently adapts to the solar environment where it is installed, greatly extending system performance and reliability while reducing component size and cost. Specialized temperature-compensated charging software and electronics optimize the battery charge levels for the FP-50 over the course of each day, depending on the available solar power. As the FP-50's battery system discharges over the course of the night, low-voltage LED driver electronics ensure that the LED luminaire receives a constant drive level.
Instrument and control switches
Series 24G instrument and control switches from Electroswitch are designed to withstand the rigors of military applications. The basic blade and terminal configuration allows multiple contacts in the same deck, and a single switch can have up to 10 decks (20 poles) and eight positions. Switching action can be detent or spring-return. Angle of throw is 45°. Waterproof mounts are available.
Series 24G switches are available with a choice of electrical ratings: 20 A/500 V (continuous), 20 A/125 Vac resistive (inductive), 10 Vac to 250 Vac resistive (inductive), 5 A/500 Vac resistive (inductive), and 0.4 A to 350 Vdc resistive (inductive). Rotors (movable contacts) are made of silver-overlay phosphor bronze, stators (stationary contacts) are silver-overlay copper, and spacers are glass-filled alkyd.
Two standard contact configurations are available. In the most common arrangement, used in all control switches and for any other applications requiring two or three positions, there are two separate and independent contacts in each deck. The second standard configuration is useful in tap, transfer, and selector switches for metering and other applications requiring three or more “ON” positions.
Modular design permits literally millions of custom configurations, but pre-configured, application-specific models available include a variety of voltmeter transfer switches, ammeter transfer switches, wattmeter transfer switches, a wattmeter reversing switch, a power factor switch, a synchronizing switch, a motor control switch, a temperature meter transfer switch, a circuit breaker trip switch, and circuit breaker control switches. Strap jumpers (silver-plated brass) are available for adjacent contacts, and wire-and-lug assemblies are available for same-deck or deck-to-deck jumpering. Nameplates can be standard, waterproof, target-style, or target-style with a pull-to-lock option, and can be engraved. Many models are available with a choice of handle styles: oval, round-knurled, or pistol grip.
Standard series 24G switches are shipped with mounting hardware for panels up to 3/16-inches thick. Pre-wired switches with the most common circuits are available.
The PFC front-end from Vicor's Westcor division is designed for use with its modules, ViPAC arrays, or any other modules. The 1 RU unit is a fan-cooled, power factor corrected ac-dc front end. Operating from a wide range 85 Vac to 264 Vac input, the PFC front-end provides 375 V out with a power density greater than 28 W/in3.
Measuring 6.4 in. × 7 in. × 1.72 in. (162.6 mm × 177.8 mm × 43.2 mm), the unit provides power outputs of 1100 W at 115 Vac or 2200 W at 230 Vac through four non-isolated outputs. The PFC front-end meets MIL-STD-810E for vibration. Prices are as low as $0.15/W at 100 pieces.
MMD Components' series of rad-hardened oven-controlled crystal oscillators (OCXOs) have a radiation tolerance of up to 1 G and are for use in a variety of industrial and military applications. The OCXOs can maintain a frequency stability of 1 ppb over a wide operating temperature range of -55 °C to +85 °C. Customers can specify sine wave, HCMOS, TTL or PECL output; a frequency range of 1 MHz to 120 MHz; and an input of 3.3 V, 5 V, 12 V and 15 V. Custom frequencies and input voltages are available.
The units can withstand swept sine vibration of 20 Gs, 10 Hz to 500 Hz, and mechanical shock of 500 Gs, half-sine pulse at 0.1 ms, three axis. MMD can also accommodate a customer's more stringent requirements. In addition, the OCXOs have been tested and screened per MIL-PRF-55310 and MIL-STD-883 Class B standards.
The OCXOs come in a variety of packages: 14-pin dual in-line (DIL), 1 in. × 1 in., 1.5 in. × 1.5 in. and 2 in. × 2 in. Prices start at $300 each in 100-unit quantities.
Solid-state power amplifier
Comtech PST's model BME27258-50 is a solid-state class AB linear amplifier, which operates over the full 20 MHz to 2500 MHz frequency range in a single module. The typical P1 dB is 40 W, with a saturated output power of 50 W. It has been designed for use in rugged military environments, and can be produced in high volume.
The gain of this amplifier is 64 dB, 64.0 dB. The input VSWR is 2:1 (maximum). The harmonic rejection is -15 dBc, and its spurious signal is -60 dBc. It requires an input voltage of +28 Vdc. The RF input and output connectors are type SMA female. The BME27258-50 is designed to operate up to 30,000 feet, from -40 °C to +50 °C. The amplifier is 6.4 in. × 6.7 in. × 1.4 in.) and weighs five pounds.
The direction-finding (DF) antenna from Astron Wireless is a compact ship-board or platform-mounted array of HF, VHF and UHF elements assembled and networked to perform direction-finding operations. The HESA platform provides a flexible system for configuring multiple-antenna elements in a small form factor.
Most surveillance applications typically require highly sensitive signal capture requirements using multiple frequencies. By networking various elements and their associated electronics such as amplifiers, multiple frequencies can be co-located. The Astron Wireless HESA technology provides an environment that optimizes antenna and system efficiency, leading to greater signal capture and reduced error rates.
Heat sink attachment system
Advanced Thermal Solutions' (ATS) maxiGRIP, a heat sink attachment system for mounting heat sinks to flip chips, BGAs and other components, has passed MIL-STD-810 shock testing and unpackaged drop testing. Shock and vibration testing was performed and certified by National Technical Systems Inc. (NTS).
The system features a plastic frame clip that snaps securely around a component's perimeter. A stainless steel spring clip runs though the heat sink's fin field and fastens securely to the plastic frame. The spring clip is easily removed to allow a heat sink to be detached and re-attached without damaging the component.
There is no chance of over- or under-tightening the sink to the processor's surface or having the heat sink pop out during transport, installation or shock and vibration. Also, because there is no need to bore holes into the board to secure the heat sink, there is decidedly more space for circuit traces on the PC board.
In addition to MIL-STD-810 shock testing and unpackaged drop testing, NTS tested and certified maxiGRIP in accordance with Telcordia GR-63-core office vibration and ETSI 300 019 transportation vibration standards. The system is available for a range of heat sinks and components sizes and prices are below $8.00 in production quantities.
Advanced Thermal Solutions
State of the Art (SOTA) offers enhanced performance MIL-PRF-38534 compliant silicon, high-reliability chip resistors. The resistors are available in four different case sizes 0202 (0.020 in. × 0.020 in.), 0303 (0.030 in. × 0.030 in.), 0404 (0.040 in. × 0.040 in.) and 0505 (0.050 in. × 0.050 in.) with tolerances to 0.1%, power ratings from 100 mW to 500 mW, temperature coefficients of resistance as low as 25 ppm, and voltage ratings at 100 V. The operating range for these resistors is from -55 °C to + 125 °C.
The resistors are available in termination type A (wire bondable) or termination style D (wire bondable with a metallized bottom). Silicon resistors are constructed using proprietary thin film technology and have higher power ratings than alumina due to the reduced thermal resistance of the silicon substrate.
Customers can select from a wide variety of testing options. Testing to customer source controlled drawings is also available. Pricing is generally less than $1.00 in manufacturing quantities.
State of the Art