| A Novel Compact Metamaterial Zeroth Order Resonant Bandpass Filter for a VHF Band and Its Stopband Improvement by Transmission Zeros |
|
Sungtek Kahng, Geonho Jang |
|
Department of Information & Telecommunication Engineering, Incheon National University |
|
|
|
|
|
| Abstract |
|
A novel compact and low-loss VHF bandpass filter is presented with enhanced stopband performance using metamaterial zeroth order resonator (ZOR) characteristics. An in-line ZOR filter is initially suggested and changed to have transmission zeros (TZs) due to source-load coupling for effective improvement of the isolation from UHF wireless channels. The proposed filter is smaller than 1/10 of the conventional filters in terms of size and has relatively very low insertion loss (< 1 dB for the electromagnetic (EM) simulation and < 3 dB for the measurement) and return loss (<-20 dB) in the passband due to the approximately 80% size reduction and the higher isolation in the stopband due to the TZs. The circuit and EM simulation are in good agreement with the measurements. |
| Key words:
Bandpass Filter, Metamaterial, Transmission Zero, VHF, Zeroth Order Resonance |
PDF Links
Full text via DOI
Download Citation
