New Approach to Hybrid Multiplexer Using Composite Right-Left Handed Lines

In this letter, a new approach to hybrid multiplexer is proposed which is based on the frequency dispersive characteristic of the Composite Right Left Handed (CRLH) lines, which in conjunction with dual band filters permit one single module to handle two frequencies. This allows size reduction since only half as many modules are required for multiband systems. Simulated and measurement responses are presented showing good agreement.