Abstract
This article presents a design for wideband bandpass filters using a microstrip cavity coupler. The broadband nature of the cavity-coupled designs is fully exploited for this application. Two additional circuits are introduced to improve the stopband performance of the cavity-coupled bandpass filter. A prototype design example is presented with its center frequency located at 6.28 GHz. The design has the merits of wide bandwith of more than 140%, flat group delay within the passband, good insertion/return loss, and stopband attenuation of nearly 30 dB up to 30 GHz. The validity of the simulation results is verified experimentally.
Original language | English |
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Pages (from-to) | 2814-2817 |
Number of pages | 4 |
Journal | Microwave and Optical Technology Letters |
Volume | 53 |
Issue number | 12 |
DOIs | |
State | Published - 12 2011 |
Keywords
- bandpass filter
- cavity coupler
- wideband