UM E-Theses Collection (澳門大學電子學位論文庫)
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
Yang, Li
Faculty of Science and Technology
Department of Electrical and Computer Engineering
Electric filters, Bandpass
Radio frequency integrated circuits
Electrical and Computer Engineering -- Department of Electrical and Computer Engineering

Choi Wai Wa
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1/F Zone C