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Industry News

AMPLIFIERS

August 1, 1999
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AMPLIFIERS

PCS 13 W CDMA High Power Amplifier
The model HPA1920-13 highly linear 13 W CDMA high power amplifier has a solid-state design that covers the PCS transmit band of 1930 to 1990 MHz. Gain is 30 dB with other options available. The unit is suitable for single-channel tower-top or base station applications. The rugged amplifier design meets all specifications over a DC input range of 26 to 29 V DC with an operational current of < 5.5 AMPS. The operational baseplate temperature range is -30° to +85°C. Circulator protection is provided for transmission into any load mismatch. Size: 12" x 5.8" x 1.1". An optional 1819 to 1870 MHz model is available.}
MPD Technologies Inc.,
Hauppauge, NY
(516) 231-1400, ext. 452.

Tower-mounted Amplifier System
The model TMA 1900-DD tower-mounted amplifier system increases the receive sensitivity of PCS base stations. The system consists of three components: the tower-mounted amplifier, amplifier interface unit and system status panel. The tower-mounted amplifier boosts receive signals by 12 to 15 dB and can be used in transmit/receive or receive-only configurations. Two performance levels are available: The low noise version provides good receive sensitivity performance with a 1.8 dB noise figure; the standard version maintains good receive sensitivity with a 2.2 dB noise figure and features a high third-order intercept point for additional immunity from interference in co-located sites. The amplifier interface unit functions as a bias-T with full remote fault reporting through open collector or relay contacts. The system status panel provides central power distribution and fusing, alarm interfacing and visual status monitoring for up to six tower-mounted amplifiers.
Andrew Corp.,
Orland Park, IL
(800) 255-1479

18 W PCS CDMA Amplifier
This 18 W PCS CDMA amplifier operates over the frequency range of 1930 to 1990 MHz. Housed in a single, rugged, reliable assembly, the GaAs FET class AB linear amplifier serves the forward-channel transmission requirement of a typical PCS system. The amplifier has a gain of 45 dB (typ) at 25°C and an output power flatness of +/-1 dB (max). The operating temperature range is -40° to +85°C baseplate. The standard forward power detection is 0 to 4 V DC and reverse detection is an option. Features include an optional integral heat sink for forced air cooling, an onboard microprocessor for remote on/off control and health status monitoring, and an integral output isolator. Size: 10.50" x 5.00" x 1.75".
Chesapeake Microwave Technologies Inc.,
Glen Rock, PA
(717) 235-1655, ext. 112.

Tower-mounted Amplifier
The model ATM192012-2 tower-mounted amplifier provides extended PCS base station coverage by reducing overall system noise. The use of the new amplifier reportedly can potentially reduce the number of sites required to operate a system by up to 40 percent. Models are available to cover the frequency assignments of A Block, B Block or C Block carriers. The unit's noise figure of 1.8 dB promotes improved receiver performance. Transmit loss is 0.2 dB.
Celwave, a division of Radio Frequency Systems Inc.,
Phoenix, AZ
(800) 235-9283.

55 - 60 GHz Low Noise Amplifier
The model CHA2157 low noise, medium power amplifier operates in the frequency range of 55 to 60 GHz. Noise figure is 4 dB, output power is 15 dBm at the 1 dB compression point and gain is 12 dB. A temperature sensor is implemented on the chip. Chip size is 1.78 mm2.
United Monolithic Semiconductors SAS (UMS),
Orsay, France
+33 1-69-33-03-08.

25 W L-band Linear Power Amplifier
This 25 W L-band linear power amplifier has a frequency range of 1500 to 1750 MHz, gain of 24 dB (nom), input/output SWR of 1.5 and input/output impedance of 50 W. Designed for QPSK, BPSK and CDMA spread spectrum applications, the unit features CW or burst operational modes and an optional heat sink. P1dB is 44 dBm (typ), 43.5 dBm (min) over temperature, efficiency is 45 percent, spurious is < -70 dBc and operating temperature range is -40° to +85°C.
Chesapeake Microwave Technologies Inc.,
Glen Rock, PA
(717) 235-1655, ext. 112.

Dual-band TDMA Power Amplifiers
The model MRFIC1856 dual-band, dual-mode TDMA power amplifiers are designed to operate in the frequency ranges of 824 to 849 MHz for TDMA and AMPS handsets and 1850 to 1910 MHz for PCS TDMA telephones. The units have adjacent-channel power and alternate-channel power specifications of -29 and -48 dBc, respectively, operate with a supply voltage of 3.6 V and are packaged in a high power, low profile TSSOP-20EP surface-mount package with a backside metal contact. The high thermal conductivity of the TSSOP-20EP provides RF output of at least 30 dBm without consuming excessive board space. Price: $5.65 each (10,000).
Motorola, Semiconductor Products Sector,
Phoenix, AZ
(602) 413-4991.

Power Amplifier Module
The RF3101 high power, high efficiency linear amplifier module is designed for 3 V digital cellular and spread spectrum systems in the 1850 to 1910 MHz frequency band. The self-contained unit delivers 29 dBm linear output power and 24 dB linear gain while operating at 35 percent efficiency. Offered in a LGA package, the RF3101 is believed to be the smallest PCS amplifier module in the industry. Both the input and output are matched to 50 W internally and require no additional components externally. Size: 5 mm x 6 mm x 1.7 mm.
RF Micro Devices,
Greensboro, NC
(336) 664-1233, ext. 6652.

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