Dual-Mode Dual-Band Bandpass Filter Using a Single Slotted Circular Patch Resonator

Zhang, Runqi; Li, Zhu; Liu, Sha

doi:10.1109/lmwc.2012.2192419

Cited by 62 publications

(49 citation statements)

References 13 publications

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“…Recently, dualmode filters have been an attractive solution for dual-band applications due to its intrinsic compactness and dual-band characteristic. Different approaches in designing dual-mode dual-band filters are proposed using ring resonators [1,2,3], stubloaded resonators [4,5], slotted patch resonators [6,7,8,9,10], and resonators with other different structures [11,12]. Among these dual-band dual-mode approaches, adjustable frequency ratio is obtained in [2] using microwave C-sections, however the coupling gap is extremely small.…”

Section: Introductionmentioning

confidence: 99%

“…In [5], a dual-band filter with controllable bandwidths is designed by using a square patch with cross slots and two sets of loaded stub. Circular patch resonator with radial-oriented slots is also used to design a dual-mode dual-band bandpass filter (BPF) by utilizing the degenerate modes [9]. In both cases, the tunable frequency ratios are limited.…”

Section: Introductionmentioning

confidence: 99%

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A compact dual-mode dual-band bandpass filter design with controllable first passband

Shi

2014

IEICE Electron. Express

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A single patch resonator with right crossed slots and rectangular perturbation is proposed to implement a dual-mode dual-band bandpass filter. The first resonance varies with the width and length change of the slots leading to a flexibly tuned first passband during the design phase. The second resonance is not perturbed because of the right crossed slots. The rectangular perturbation located at the diagonal creates transmission zeros near the first passband edges while the spur-lines generate transmission zeros near the second passband so as to achieve higher frequency selectivity. Therefore the bandwidths of the two passbands can be tuned independently. A dual-mode dual-band filer operating at 1.57 and 5.2 GHz for GPS and WLAN application is designed and manufactured for demonstration. Good agreements are found between simulation and measurements. Keywords: bandpass filter, dual-band, dual-mode, right crossed slots Classification: Microwave and millimeter wave devices, circuits, and systems References[1] T.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A compact dual-mode dual-band bandpass filter design with controllable first passband

Shi

2014

IEICE Electron. Express

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“…Because two orthogonal modes are coupled, two transmission poles occur in each passband. This idea was applied in dual-band filters with ring-shaped resonators (88,89) and perturbed patch resonators (90,91) as well as in tri-band filters with ringshaped resonators (92). The proposed filters show good performance in terms of insertion loss as a result of two transmission poles in each passband.…”

Section: Multiband Filters Based On Resonators With Perturbationmentioning

confidence: 99%

Advances in Planar Filters

Crnojević‐Bengin

Janković

2014

Wiley Encyclopedia of Electrical and Electronics Engineering

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Many microstrip filter configurations exist that exhibit advanced filtering characteristics, rely on new design techniques, or use original methods for filter miniaturization. For each filter type (lowpass, highpass, bandpass, and bandstop), we start with an overview of conventional planar filters, which are often used as a basis for the development of novel configurations, and then proceed to more advanced solutions. We classify the various advanced solutions found in the literature according to the underlying principle of design/operation: i) conventional filters using advanced geometries; ii) filters based on advanced theoretical concepts, such as the slow‐wave effect, defected ground structures (DGSs), electromagnetic‐bandgap (EBG) structures, or metamaterials (MTMs); and iii) filters based on advanced materials and technologies, such as superconducting, ferroelectric materials, and ferromagnetic materials. Finally, we present some of the advanced solutions not covered by the classification given above. We provide an overview of surface‐integrated waveguide (SIW) filters, followed by the discussion of various tunable and reconfigurable filter topologies. In the end, we present state‐of‐the art multiband filters.

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“…Among these filters, dual-mode resonator filters have been widely used for their compact size. [1][2][3][4][5][6][7] The microstrip dual-mode triangular patch resonators and their applications for dual-mode filters with less than 10% 3-dB fractional bandwidth (FBW) have been investigated in [1]. A dual-mode bandpass filter (BPF) with 3-dB FBW of 16% using a pair of spur-line resonators has been reported in [2].…”

Section: Introductionmentioning

confidence: 99%

“…A single-slotted circular patch resonator has been used to design a dual-mode dual-band BPF, which has a 3-dB FBW of less than 10% in any passband. [3] A BPF based on E-shaped dual-mode resonator has been designed and implemented, which has a FBW of 2%. [4] In [5], a dual-mode half wavelength resonator filter with centrally loaded open stub and quasi-L-shaped feed-lines has been reported, which has a narrow FBW of 4.7% at the central frequency.…”

Section: Introductionmentioning

confidence: 99%

Wideband dual-mode bandpass filter using a modified right-triangular patch resonator overlapped with input/output DMS

Chen

Ke-song

et al. 2013

Journal of Electromagnetic Waves and Applications

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A novel and compact dual-mode wideband bandpass filter (BPF) with multiple transmission zeros is designed, fabricated, and measured in this paper. This filter consists of a modified right-triangle patch resonator with two orthogonal narrow-strip stubs and improved input/output defected microstrip structure (DMS). The designed resonator and DMS show dual-mode and dual-bandgap characteristics, respectively. The equivalent circuit models are described and their element values are also extracted by the full-wave EM simulator. The presented BPF is constructed by cascading the stub of patch resonator with the input/output DMS and overlapping partly with each other between the stub of resonator and middle conductor strip of input/output DMS. The EM simulated result has been confirmed by an experimental one and they have shown good agreement with each other. The measured result exhibits wide passband and low insertion loss characteristics for the proposed filter. IntroductionWith the rapid development of modern mobile communication systems, the miniaturized, low-cost, and wideband filters with lower insertion loss and higher frequency selectivity have been increasing demands in many wireless applications. Among these filters, dual-mode resonator filters have been widely used for their compact size.[1-7] The microstrip dual-mode triangular patch resonators and their applications for dual-mode filters with less than 10% 3-dB fractional bandwidth (FBW) have been investigated in [1]. A dual-mode bandpass filter (BPF) with 3-dB FBW of 16% using a pair of spur-line resonators has been reported in [2]. A single-slotted circular patch resonator has been used to design a dual-mode dual-band BPF, which has a 3-dB FBW of less than 10% in any passband.[3] A BPF based on E-shaped dual-mode resonator has been designed and implemented, which has a FBW of 2%.[4] In [5], a dual-mode half wavelength resonator filter with centrally loaded open stub and quasi-L-shaped feed-lines has been reported, which has a narrow FBW of 4.7% at the central frequency. A fourth-order dual-mode microstrip BPF with a FBW of 11% has been developed in [6]. In general, the insertion losses of above-mentioned filters are greater than 1.0 dB within their passbands. A coupled-line BPF using dual-mode half-wavelength SIR centrally loaded with shorted stub has been studied in [7], which has a suppression characteristic for high-order harmonics, however, the dual-mode filter still has a narrow bandwidth and high insertion

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Dual-Mode Dual-Band Bandpass Filter Using a Single Slotted Circular Patch Resonator

Cited by 62 publications

References 13 publications

A compact dual-mode dual-band bandpass filter design with controllable first passband

A compact dual-mode dual-band bandpass filter design with controllable first passband

Advances in Planar Filters

Wideband dual-mode bandpass filter using a modified right-triangular patch resonator overlapped with input/output DMS

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