High-Speed DF Antenna Band Switch
DF-A0157
The DF-A0157 is a high-speed, 4-band switch intended for direction finding applications. It accepts four frequency bands, each with five antenna elements, and outputs the elements of any one band to the corresponding five RF outputs. The switch is controlled via an RS-485 serial interface to allow remote control over a distance of up to 500m. All switching is solid state for rapid and unlimited switching cycles. The DF-A0157 includes an internal noise source as well as an external input for chain calibration purposes. Either the internal noise source or the external calibration input may be selected to simultaneously inject a balanced signal in place of the antenna inputs and thereby correct errors caused by variations in the system’s RF path.
Additional information
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Specifications
| Frequency range | 20 - 6000 MHz |
| Frequency bands | Band A: 20 - 500 MHz; Band B: 100 - 1400 MHz; Band C: 500 - 3600 MHz; Band D: 2000 - 6000 MHz |
| Channels per band | 5 |
| Input VSWR | < 2.5:1 |
| Gain 100 MHz 3 GHz 6 GHz | 20 ± 2 dB 24 ± 2 dB 25 ± 2 dB |
| Noise figure | < 13 dB |
| OIP3 (typical) 100 MHz 3 GHz 6 GHz | 28 dBm active |
| Maximum input level | 20 dBm CW |
| Gain Amplitude unbalance | < 2 dB |
| Phase unbalance | < 15° |
| Maximum input level | 20 dBm passive |
| Internal noise source power output | 66 ± 4 dB ENR |
| Frequency range | 20 - 6000 MHz |
| Input VSWR | < 2.5 :1 |
| Gain 100 MHz 3 GHz 6 GHz | 20 ± 2 dB 24 ± 2 dB 25 ± 2 dB |
- Radio Direction Finding
- C-ESM
Product Applications
Signals Intelligence
- DF switch 4-band switch External injection mode for chain calibration Internal chain calibration noise source, selectable with either inline amplifier or with the amplifier bypassed. Low noise amplifier on each channel with passive bypass capability High-speed solid state switching Monitoring Single-channel amplifier Low noise pre-amplifier on input DC-injection to power upper stages Advanced input stages: ESD protection Advanced output stages: Output amplifiers for long cables Cable slope correction on amplifiers ESD protection
