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UM E-Theses Collection (澳門大學電子學位論文庫)

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Title

Design of integrated differential dual-band bandpass filter-antenna module

English Abstract

For the modern wireless communication systems, the RF front-end circuits with function versatility and compact size attract great attention. In this thesis, the concept of integrated dual-band bandpass filter and antenna operated different frequencies is proposed and studied in both single-ended and differential structures. For the single-ended integrated filter-antenna (IFA) module, two three-port prototype IFA modules have been analyzed and experimentally measured. The proposed dual-band bandpass filter and slot antenna can work independently on single substrate. Moreover, the spurious passband rejection of dual-band filter is achieved due to the band-gap effect of annular slot antenna for the second IFA module. On the other hand, based on the advantages of RF components in balanced structure, a differential dual-band bandpass filter with controllable transmission zeros is presented. The transmission zero conditions of asymmetric loaded parallel coupled-line (PCL) are derived. By terminating a stepped-impedance open stub on the symmetric plane, the common-mode transmission zeros of proposed differential dual-band filter can be relocated to realize about 40 dB in-band and 25 dB wideband common-mode suppression. Thus, with a pair of monopole antennas terminated on the symmetric plane, an innovative integrated differential dual-band bandpass filter-antenna module is proposed and simulated.

Issue date

2013

Author

Yang, Li

Faculty

Faculty of Science and Technology

Degree

M.Sc.

Subject

Electric filters, Bandpass

Radio frequency integrated circuits

Electrical and Computer Engineering -- Department of Electrical and Computer Engineering

Supervisor

Choi, Wai Wa

Tam, Kam Weng

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Location
1/F Zone C
Library URL
991007408069706306