CPI Diplexer 112900-41

CPI 112900-41 Ka-Band 4-Port Diplexer | Circular Polarized, 85 dB Isolation

The CPI 112900-41 is a precision-engineered Ka-band 4-port diplexer with circular polarization, built for high-power satellite uplink and downlink applications. It supports 18.3–21.2 GHz receive and 28.4–31.0 GHz transmit frequencies, with excellent port-to-port isolation (≥85 dB) and low insertion loss. Designed for robust 1.0 kW total power handling (500 W per TX port), it features exceptional axial ratio performance across sub-bands and a weather-resistant, sealed construction with premium copper alloy and zinc-nickel finishes.

Key Features:

Frequency Band: Rx 18.3–21.2 GHz | Tx 28.4–31.0 GHz
Insertion Loss: Rx ≤0.25 dB, Tx ≤0.20 dB
VSWR: ≤1.25:1 (Rx & Tx)
Isolation: ≥85 dB (Tx/Rx, Rx/Tx), ≥20 dB (Tx/Tx, Rx/Rx)
Axial Ratio:
Rx: ≤1.00 dB @ 18.3–18.7 GHz
≤0.75 dB @ 18.7–20.2 GHz
≤0.50 dB @ 20.2–21.2 GHz
Tx: ≤0.50 dB
Power Handling: 1.0 kW CW total (500 W per Tx port)
Construction: Copper alloy (Tx/Rx), zinc-nickel plated common port
Pressurization: Sealed to 5.0 PSIG
Finish: White paint, FED-STD-595 #17875