Conference Proceeding

Half mode substrate integrated waveguide broadband bandpass filter using photonic band gap structures

Sch. of Phys. Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu
05/2008; DOI:10.1109/ICMMT.2008.4540290 ISBN: 978-1-4244-1879-4 pp.22 - 24 In proceeding of: Microwave and Millimeter Wave Technology, 2008. ICMMT 2008. International Conference on, Volume: 1
Source: IEEE Xplore

ABSTRACT A planar half mode substrate integrated waveguide (HMSIW) broadband bandpass filter is proposed. It is realized by cascading a lowpass filter and a highpass filter. A transmission line with half mode substrate integrated waveguide (HMSIW) on the circuit board has the characteristic of highpass, while a periodic uniform photo band structure (PBG) array has the characteristic of bandstop. Combining these two structures, a novel compact broadband bandpass filter (BPF) is fabricated and measured. Measured results show that the proposed BPF has wide bandwidth from 11.8 GHz to 23.8 GHz, all the measured insert loss are less than 3.6 dB, return loss are less than 9 dB in the passband. The BPF achieves a wide stopband with 34 dB attenuation low to 5 GHz and 27 dB attenuation up to 35 GHz.

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Keywords

27 dB attenuation
 
34 dB attenuation low
 
bandstop
 
BPF
 
circuit board
 
HMSIW
 
mode substrate
 
novel compact broadband bandpass filter
 
periodic uniform photo band structure
 
proposed BPF
 
return loss
 
transmission line
 
two structures
 
waveguide
 

Cuilin Zhong