Novel ultra-wideband bandpass filter with notched band using stubs loaded multi-mode ring resonator

2013 ◽  
Author(s):  
MinhTan Doan
Keyword(s):  
Bandpass Filter ◽  
Ring Resonator ◽  
Ultra Wideband ◽  
Notched Band ◽  
Multi Mode

scholarly journals ULTRA-WIDEBAND MULTI-STUB LOADED RING RESONATOR BANDPASS FILTER WITH A NOTCHED-BAND

2013 ◽  
Vol 41 ◽  
pp. 27-39 ◽  
Author(s):  
Zhi-Peng Li ◽  
Tao Su ◽  
Yong-Liang Zhang ◽  
Sheng-Jie Wang ◽  
Chang-Hong Liang
Keyword(s):  
Bandpass Filter ◽  
Ring Resonator ◽  
Ultra Wideband ◽  
Notched Band

Design and analysis of a planar UWB bandpass filter with stopband characteristics using MMR technique

2021 ◽  
pp. 1-8
Author(s):  
Gaurav Saxena ◽  
Priyanka Jain ◽  
Y. K. Awasthi
Keyword(s):  
Return Loss ◽  
Group Delay ◽  
Bandpass Filter ◽  
Ground Plane ◽  
Cost Effective ◽  
Ultra Wideband ◽  
Defected Ground Structures ◽  
Ground Structures ◽  
Multi Mode ◽  
Mode Resonator

Abstract In this paper, a ultra-wideband (UWB) bandpass filter with stopband characteristics is presented using a multi-mode resonator (MMR) technique. An MMR is formed by loading three dumbbell-shaped (Mickey and circular) shunt stubs placed in the center and two symmetrical locations from ports, respectively. Three circular and arrowhead defected ground structures on the ground plane are introduced to achieve UWB bandwidth with a better roll-off rate. The proposed filter exhibits stopband characteristics from 10.8 to 20 GHz with a 0.4 dB return loss. The group delay and roll-off rate of the designed filter are <0.30 ns in the passband and 16 dB/GHz at lower and higher cut-off frequencies, respectively. The dimension of the filter is 0.74λg × 0.67λg mm2 and was fabricated on a cost-effective substrate. All simulated results are verified through the experimental results.

Design of compact frequency agile filter-antenna using reconfigurable ring resonator bandpass filter for future cognitive radios

2018 ◽  
Vol 10 (4) ◽  
pp. 487-496 ◽  
Author(s):  
Hany A. Atallah ◽  
Adel B. Abdel-Rahman ◽  
Kuniaki Yoshitomi ◽  
Ramesh K. Pokharel
Keyword(s):  
Bandpass Filter ◽  
Ring Resonator ◽  
Cognitive Radios ◽  
Ultra Wideband ◽  
Planar Antenna ◽  
Radiation Characteristics ◽  
Total Size ◽  
Frequency Agile ◽  
Narrow Bands ◽  
Good Agreement

AbstractIn this paper, a new miniaturized frequency agile filter-antenna with a wide reconfigurable frequency band is proposed for interweave cognitive radios (CRs). A tunable bandpass filter (BPF) composed of a symmetrical ring resonator is cascaded to the feed line of an ultra-wideband planar antenna. The structure of the proposed ring resonator BPF is simple and compact so that the total size of the proposed filter-antenna is smaller than that of a conventional system made of a separate antenna and BPF. The reconfigurability of the proposed filter-antenna is achieved by changing the operating frequency of the BPF by loading the ring resonator with a single varactor diode at its center. The fabricated prototype has successfully achieved a wide operational bandwidth of 1.43 GHz which covers continuous narrow bands from 4.65 to 6.08 GHz. Moreover, the operating tunable narrow bands have stable radiation characteristics. Good agreement between measurement and simulation results is demonstrated.

scholarly journals Compact quintuple notched-band UWB BPF with high selectivity and wide bandwidth

2020 ◽  
pp. 1-7
Author(s):  
Lei Bai ◽  
Yiqi Zhuang ◽  
Zhibin Zeng
Keyword(s):  
Closed Loop ◽  
High Selectivity ◽  
Bandpass Filter ◽  
Ultra Wideband ◽  
Wide Bandwidth ◽  
Fractal Curve ◽  
Transmission Zeros ◽  
Notched Band ◽  
X Band ◽  
Stepped Impedance Resonator

Abstract In this paper, a compact quintuple notched-band ultra-wideband bandpass filter with high selectivity and wide bandwidth is proposed. The filter adopts an approximate closed-loop C-shaped stepped impedance resonator to generate triple notched bands, and uses Hilbert fractal curve slit and L-shaped resonator to create single notched band, respectively. Multiple notched-band are centered at 5.29, 6.61, 7.92, 8.95, and 9.93 GHz to eliminate undesired interference from coexisting wireless services of WLAN, C-band, and X-band. Additionally, two transmission zeros are introduced to enhance the sharp skirt selectivity up to 0.944. This filter could exhibit high sharp selectivity and wider bandwidth simultaneously. The filter is fabricated on a RT/Duroid 5880 substrate (ɛ r = 2.2 and thickness = 0.787 mm) and measured to verify the simulation results. Both simulation and measurement are in well agreement, showing the good performance of the filter.

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