CPI Diplexer 113089-8
4-Port K Band Diplexer

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CPI 113089-8 K-Band 4-Port Diplexer | Linear Polarized High-Isolation
The CPI 113089-8 is a high-isolation K-Band 4-port diplexer optimized for linear polarized SATCOM systems. Operating across 21.45–25.2 GHz, it supports dual TX and RX paths with low insertion loss and excellent cross-polarization rejection.
Key Features:
Frequency Band:
• RX: 21.45–21.95 GHz
• TX: 24.7–25.2 GHz
Insertion Loss:
• RX: 0.40 dB max
• TX: 0.40 dB max
VSWR: 1.30:1 max (both RX and TX)
Isolation:
• TX/RX: 100 dB min
• RX/TX: 60 dB min
• RX/RX: 30 dB min
• TX/TX: 40 dB min
Cross-Polarization: 30 dB min
Power Handling: 500 W CW total (250 W per TX port)
Pressurization: Sealed to 0.5 PSIG
Finish:
• Flange Faces: Copper Alloy
• Exterior: White Paint, FED-STD-595 Color No. 17875