Abstract
The contribution of this work is to propose novel balanced bandpass filters (BPFs) using the half-mode substrate integrated waveguide (HMSIW) and its size-reduced form, a folded HMSIW structure. The size of an HMSIW is about half of the substrate integrated waveguide (SIW) and the size of the folded HMSIW further reduces to 25%. Besides compactness, the proposed BPFs are attractive because the thru-via array needed for providing the side-wall effect is no longer required. In addition, the common-mode (CM) rejection of the HMSIW BPF is achieved from the non-coupling slots, caused by the PMC. The CM rejection of the folded HMSIW BPF is obtained by up-shifting the CM operating frequency far away from the differential-mode (DM) passband. Prototypes of the proposed circuits are fabricated and measured to present CM rejection levels larger than 40 dB over a wide frequency range and DM insertion losses around 2 dB in the passbands. Agreements between measured and simulated data are observed to validate the circuit design and performance.
Original language | English |
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Article number | 6415314 |
Pages (from-to) | 78-80 |
Number of pages | 3 |
Journal | IEEE Microwave and Wireless Components Letters |
Volume | 23 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2013 Jan 22 |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Electrical and Electronic Engineering