The helical duplexer is an essential accessory for duplex radios and repeaters of various frequencies. Its function is to isolate the transmitting and receiving signals, thereby ensuring that both transmitting and receiving functions can operate normally at the same time.
It is composed of two sets of band-stop filters with different frequencies, which effectively prevent the local transmitter's signal from reaching the receiver. The device features strong suppression capability, low insertion loss, and high isolation.
| Model No. | Band Pass (MHz) | Separation(MHz) | Insertion Loss(dB) | VSWR | Rejection(dB) | Connector Type |
| SDX-136-174-50-4.6 | dot | ≥4.6 | ≤1.5 | ≤1.3 | ≥70 | N |
| SDX-136-174-50-2-4.6 | 2 | ≥4.6 | ≤1.5 | ≤1.3 | ≥70 | SMA/N |
| SDX-330-520-50-5 | dot | ≥4.6 | ≤1.5 | ≤1.3 | ≥70 | N |
| SDX-330-360-50-5-10 | 5 | ≥10 | ≤1.5 | ≤1.3 | ≥70 | SMA/N |
| SDX-360-400-50-4-10 | 4 | ≥10 | ≤1.5 | ≤1.3 | ≥70 | SMA/N |
| SDX-400-520-50-3-10 | 3 | ≥10 | ≤1.5 | ≤1.3 | ≥70 | SMA/N |
| Model rules: product category SDX-LO starting frequency-HI ending frequency-average power-operating bandwidth-transmitting and receiving interval-version number | ||||||
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