A cavity diplexer does one job extremely well: it takes two frequency bands and routes each one down its own path, while both share a single antenna. Simple concept, powerful result — and it's exactly what keeps your system clean and efficient. At Keenlion, we build cavity diplexers as a factory-direct manufacturer: low insertion loss, high isolation, rugged aluminum housing that performs in the field. Telecom or defense, standard or fully custom — we deliver what your system needs, at factory pricing. Let's talk about your specs.

Core Function of a Cavity Diplexer

Therefore, what exactly is a Cavity Diplexer? In simple terms, a Cavity Diplexer is a device that combines or separates two separate frequency ranges so they may share one common antenna connection. The cavity diplexer uses the ability of metals to resonate inside cavities. The cavity diplexer will take in a signal through the common port and route the low frequency range signals to one port, and the high frequency range signals to a different port. Thus, any time that there’s a need for two separate radios to be used at the same time, without causing interference between each other, a cavity diplexer will be necessary.

Why Cavity Technology Matters

Unlike LC or microstrip designs, the cavity diplexer uses an air or dielectrically loaded metal cavity resonator. This design provides the cavity diplexer with extremely high Q-factor resulting in extremely low insertion loss and steep rejection skirts. A properly designed cavity diplexer can be designed to have less than 0.7dB insertion loss while providing inter-band isolation exceeding 90dB. It is for these reasons that the cavity diplexer is the dominant duplexer technology used in basestation, repeater, and satellite ground station applications. In addition to the above, a cavity duplexer technology offers the highest power handling capability (typically >= 100W) while maintaining its peak performance characteristics.

Custom Cavity Diplexers from Keenlion

Every cavity diplexer from Keenlion is built to order. We customize frequency bands, connector types, rejection profiles, and housing dimensions to match your exact system. Whether you need a cavity diplexer for LTE, PCS, or specialized defense bands, our factory-direct pricing and engineering support deliver real value.

Si Chuan Keenlion Microwave a large selection in narrowband and broadband configurations, covering frequencies from 0.5 to 50 GHz. They are designed to handle from 10 to 30 watts input power in a 50-ohm transmission system. Microstrip or stripline designs are utilized, and optimized for best performance.

We can also customize RF Cavity Diplexer according to your requirements. You can enter the customization page to provide the specifications you need.
https://www.keenlion.com/customization/
E-mail:
sales@keenlion.com
tom@keenlion.com
Sichuan Keenlion Microwave Technology Co., Ltd.