Integration of three‐dimensional high‐ Q  filters with aperture antennas and bandwidth enhancement utilising surface waves | Zendy

Yusuf Yazid | Zendy; Gong Xun | Zendy

Open Access

Integration of three‐dimensional high‐ Q filters with aperture antennas and bandwidth enhancement utilising surface waves

Author(s) -

Yusuf Yazid,

Gong Xun

Publication year - 2013

Publication title -

iet microwaves, antennas and propagation

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.555

H-Index - 69

eISSN - 1751-8733

pISSN - 1751-8725

DOI - 10.1049/iet-map.2012.0432

Subject(s) - bandwidth (computing) , optics , aperture (computer memory) , surface wave , tunable metamaterials , electronic engineering , physics , acoustics , materials science , computer science , engineering , telecommunications , metamaterial

Seamless integration of three‐dimensional cavity filters with a new antenna is presented. The antenna consists of an open‐ended waveguide aperture mounted on a ground plane. The energy coupling between the last cavity resonator and free space, which is related to the external quality ( Q ) factor of the integrated filter/antenna system, can be significantly enhanced. The low external Q factor ( Q ext ), which is necessary for the design of wide‐band filter/antenna systems, is due to the excitation and radiation of surface waves. A three‐pole cavity filter integrated with the proposed antenna is demonstrated at X band. The centre frequency and fractional bandwidth of the filter/antenna system are 10.2 GHz and 34.0%, respectively, in simulations. A prototype filter/antenna system is fabricated and measured. Good agreement between the simulated and measured results is observed.

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