Journal ArticleDOI
Compact microstrip diplexer using new design of triangular open loop resonator for 4G wireless communication systems
TLDR
A compact microstrip diplexer for 4G wireless communication systems is proposed in this article, which consists of two bandpass filters based on the triangular open loop asymmetric stepped impedance resonator in order to have a small size and simple structure.Abstract:
A compact microstrip diplexer for 4G wireless communication systems is proposed in this paper. This diplexer consists of two bandpass filters based on the triangular open loop asymmetric stepped impedance resonator in order to have a small size as well as simple structure. The T-shaped open stub is used for attenuating the undesired modes. Attenuation level for the proposed diplexer is less than 21 dB in the range of 0–10 GHz owing to using this T-shaped open stub. The center frequency of each filter can easily change in the range of 20 MHz through varying the gap length of the resonator without any changes in the whole structure of the diplexer. The result of this is the stability of other parameters like insertion loss, return loss and isolation. This diplexer has a narrow band frequency response that makes it suitable for modern wireless communication systems. Finally, the diplexer is fabricated at 2.30 and 2.55 GHz and measurements demonstrate a good agreement between simulated and fabricated diplexer.read more
Citations
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Journal ArticleDOI
Design of a microstrip diplexer with a novel structure for WiMAX and wireless applications
Leila Noori,Abbas Rezaei +1 more
TL;DR: In this paper, a combination of coupled lines, loops, step impedance and low impedance sections are used to design a compact microstrip diplexer with a total size of 573.11mm2.
Journal ArticleDOI
Design of a very compact and sharp bandpass diplexer with bended lines for GSM and LTE applications
Sobhan Roshani,Saeed Roshani +1 more
TL;DR: In this article, a miniaturized bandpass-bandpass diplexer with sharp pass-band is designed and fabricated, and two filters are designed in the schematic circuit mode, and then they are combined to form the final layout.
Journal ArticleDOI
Design of a novel compact microstrip diplexer with low insertion loss
TL;DR: In this article, a microstrip diplexer is implemented based on a novel combination of the coupled lines and spiral structures in order to reduce the circuit size as well as insertion losses.
Journal ArticleDOI
A miniaturized lowpass bandpass diplexer with high isolation
Hossein Heshmati,Sobhan Roshani +1 more
TL;DR: In this article, a low-pass-band-pass diplexer with simple structure is designed and fabricated, which has 3'dB cutoff frequency of 1'GHz in the lowpass channel and operating frequency of 2'4'GHz for the bandpass channel.
Journal ArticleDOI
Design of microstrip wide stopband quad-band bandpass filters for multi-service communication systems
Leila Noori,Abbas Rezaei +1 more
TL;DR: In this paper, two planar high performance quad-channel bandpass filters, which are designed based on a novel circular multi-mode resonator, are presented for WCDMA and WiMAX applications.
References
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Book
Microstrip filters for RF/microwave applications
TL;DR: In this paper, the authors present a general framework for coupling matrix for Coupled Resonator Filters with short-circuited Stubs (UWB) and Cascaded Quadruplet (CQ) filters.
Journal ArticleDOI
Theory and experiment of dual-mode microstrip triangular patch resonators and filters
Jia-Sheng Hong,Shuzhou Li +1 more
TL;DR: In this article, the authors report on the results of an investigation into dual-mode operation of microstrip triangular patch resonators and their applications for designing dualmode bandpass filters.
Journal ArticleDOI
Compact and High-Isolation Diplexer Using Dual-Mode Stub-Loaded Resonators
TL;DR: In this article, a compact microstrip diplexer for UMTS and WCDMA system is proposed, which is mainly composed of three dual-mode stub-loaded microstrip resonators.
Journal ArticleDOI
Microstrip Diplexer Design Using Common T-Shaped Resonator
Ming-Lin Chuang,Ming-Tien Wu +1 more
TL;DR: In this article, a microstrip diplexer with a joint T-shaped resonator was proposed for high isolation and wide stopband in addition to satisfying the passband requirement.
Proceedings ArticleDOI
Measurement and Computer-Aided Modeling of Microstrip Discontinuities by an Improved Resonator Method
TL;DR: In this paper, a broadband characterization of microstrip discontinuities by an improved resonator technique is described, which involves hitherto unknown expressions accounting for nonsymmetrical gap coupling and employs an efficient error function for the computer-aided modeling of n-ports.
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