Using intrinsic zero to notch satellite signals in UWB filter. Issue 5 (10th November 2016)

• Record Type: Journal Article
• Authors: Xiong, Yang; Teng, Cheng; He, Ming; Tam, Kam-Weng; Yu, Xian; Choi, Wai-Wa; Chen, Hai Hua
• Is Part Of: International journal of microwave and wireless technologies. Volume 9:Issue 5(2017)
• Page Start: 1009
• Page End: 1015
• Publication Date: 2016-11-10
• Subjects: Intrinsic zero, -- Notch filter, -- Ultra-wideband (UWB) filter; Wireless communication systems -- Periodicals; Microwave circuits -- Periodicals; Radio frequency -- Periodicals; 621.381305
• DOI: 10.1017/S1759078716001148
• Languages: English
• ISSNs: 1759-0787

Abstract

Abstract : In this paper, an ultra-wideband (UWB) filter with a notch band using T-shaped step impedance resonator loaded with cross-shaped open stubs has been presented. The notch band is formed by utilizing intrinsic zero. The characteristics of the new quad-mode resonator have been analyzed using odd-even mode analysis method. It can be shown that it is the intrinsic zero that generates the notch band. In addition, wide tunable notch band form 5–9.3 GHz can be achieved. A UWB filter with a notch band centered at 6.25 GHz using the proposed quad-mode resonator has been designed, fabricated, and tested. Experiment results show that the attenuation in notch frequency is >22 dB while the return loss of the simulation and measurement results are 22 dB/20 dB and 14.5 dB/11.2 dB in the lower and upper passband, respectively, which illustrate that the simulation and measurement results are in agreement.