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Bilateral Amplifiers 
900 MHz Receive & Transmit Amplifiers
These Bilateral Amplifiers are for use only by the US Government, Military customers or for export.
The AAA series of Bilateral Amplifiers are designed to improve the range of 902-928 MHz spread spectrum radios by amplifying both the transmitted and received signals right at the antenna, mitigating cable loss.
- On the receive direction, the amplifiers incorporate GaAs FET amplification along with SAW and dielectric resonator filtering. This results in a 1.5 dB Noise Figure and a +5 dBm input intercept point along with 40 dB of cellular and pager band rejection. A combination of SAW and lowpass filtering reduces harmonic output to less than -70 dBc.
- On the transmit direction, the amplifiers generate 1 W or 5 W, making them the ideal solution for extending the range of spread spectrum radios.
- The amplifiers are powered through the antenna cable, simplifying the installation process.
- The amplifiers are packaged in sealed, milled, aluminum housing, providing the utmost in weather protection.
These products consist of 3 devices: - Amplifier, mounted near the antenna (typically on the mast)
- Diplexer, mounted near a power source (typically by the radio)
- Power supply (wall wart), permanently connected to the diplexer
The diplexer receives DC power from the power supply, and adds it to the signal in the antenna cable. The amplifier separates the signal from the DC power, and uses that DC power.
Optionally, you may order amplifiers that are powered directly, without a diplexer (see below).
Specifications
| General: | | Frequency Range | 902-928 MHz | | Transmit: | | Input RF Power | 15 mW Min; 330 mW Max | | Output Power | 1 or 5 Watts Min | | Harmonic Output | 2nd -40 dBc, 3rd and higher -70 dBc | | Turn-on Transients | -70 dBc @ fc ±230 KHz, higher for lower turn-on times | | Turn-on Time | 20 µs | | Receive: | | Noise Figure | 1.5 dB Max | | Gain | 14 dB Min, higher gain optional | | Intercept Point | +5 dBm referred to input | | In-band Response | 902-928 MHz: ± 1 dB | | Out-of-band rejection | <895 MHz: -40 dB; 930 MHz: -40 dB | | Power Supply: | | Supply Voltage | 110 Vac (Included power supply) or
10.5 to 18.0 Vdc | | Power Consumption | AAA-1W: 0.35 A Max @ 12 Vdc
AAA-5W: 2.0 A Max @ 12 Vdc | | Mechanical: | | Enclosure | Milled Aluminum with Integral Bracket | | Dimensions | 63.5 W x 102 L x 21.3 H [mm]
2.5 W x 4.0 L x 0.84 H ["] | | RF Connectors | To Amplifier: SMA Female
To Diplexer: Type-N Female |
Ordering Info
| Part Number | Power | Amplifier | Diplexer |
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| AAA-1W | 1 W |  |  |
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| AAA-5W | 5 W | |  |
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Also available by special order:
| 220 Vac power supply | | Directly powered amplifier (no diplexer) | | Directly powered amplifier (no diplexer) with on/off control | | Faster turn-on/turn-off: 1 µs | | 50 ms time-out disabled (for continuous transmissions) |
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