C-Band RF Duplexer in strip line and coaxial technology. T/R RF signals are monitored by switch control circuitry.
Features
- Frequency range 5.125GHz to 5.475GHz,
- Power handling capability of 40W with PRF 412Hz ±10%,
- Switch control circuitry,
- 3 operating channels (transmit, receive and calibration),
- RS422 compatible interface
Application
C-Band RF Duplexer is designed to be used in altimeter for satellite pay-load
Architecture
Duplexer includes two strip lines channels, one which transmits and receive RF signal, and the other which calibrate the transmitted signal to the receiver as a reference.
These channels correspond to two modes of operation:
- Tracking mode, when T/R RF signal is connected to the antenna port and switch SRx isolate Rx from Tx during the time of transmission.
- Calibration mode, when T/R RF signal is isolated from the antenna by switch STx, antenna port is isolated from switch SRx and calibration couplers connect Tx to Rx.
- These two modes must be selected by compatible RS422 interface.
Technology
RF Duplexer includes strip line and coaxial components:
- Coaxial isolators and circulator
- Strip line 50 dB coupler
- Strip line PIN diodes switches
- Driver board for switches control
Specifications
Parameters | Performances |
Pass Band Insertion Loss
- transmitting mode
- receiving mode
- calibration mode | < 1.1 dB
< 1.3 dB
100 ±2 dB |
Attenuation stability
- with temperature
- during lifetime | <0.2 dBpp
<0.2 dBpp |
Pass Band VSWR | <1.20:1 |
Isolation
- transmitting mode
- receiving mode
- calibration mode | > 100 dB > 60 dB
> 140 dB |
Harmonics | < 47dBc |
Power handling | 40 W during 105 µs to 115 µs maximum pulse duration at a PRF of 412 Hz±10% |
Switch control | Switch control circuitry is incorporated in the housing |
Temperature range
- operating/storage | -10° C to + 50° C / -40° C to + 60° C |
Environmental conditions | Space requirements for flight models |
Weight | Space requirements for flight models. |