A Novel Compact Dual-Mode Filter Using Cross-Slotted Patch Resonator for Dual-Band Applications

Weng, Min‐Hang; Wu, Sean; Jhong, Shin-Bin; Chang, Yu‐Chi; Lee, Maw–Shung

doi:10.1109/mwsym.2007.380131

Cited by 14 publications

(8 citation statements)

References 10 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%

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%

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

Shi

2014

IEICE Electron. Express

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“…However, this technique requires a very strong coupling between the modes, which makes the design procedure more demanding. Based on this technique, a dual-band configuration with perturbed square patch resonators (85,86) and a ring resonator (87) was proposed.…”

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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“…Use of slots have been reported to aid in size reduction and bandwidth enhancement of patch antennas [10,11]. This technique has also been applied to patch filters for size reduction and dual band operation [12,13]. Similar techniques such as defected ground structures are also popular methods to design passive circuits based on microstrip line [14].…”

Section: Compact Patch Balun Filtermentioning

confidence: 99%

Multi-Function Patch Element

Zheng¹,

Chan²,

Man³

2010

PIER

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Abstract-Integration of multiple functions is for the first time achieved within a single patch circuit element. Firstly, out of phase equal power division and bandpass filter characteristics are combined within a patch element. The novelty of the proposed structure is to use simple asymmetric cross slots in the patch element to achieve this integration. A simplified equivalent circuit model to describe operation of this patch element is proposed. Coplanar waveguide/microstrip broadside coupling is then investigated to enhance the performance of the patch balun filter and eliminate narrow coupling gaps and microstrip lines. Subsequently, transition between microstrip and coplanar waveguide is then added to the patch element by using certain electromagnetic coupling methods for higher level integration without introducing additional loss. Different patch elements operating at 2.4 GHz are developed to validate the feasibility of the proposed structures. The circuits were designed, fabricated and measured. The measured results agree quite well with the simulation, exhibiting small amplitude and phase imbalance at the output ports throughout the desired passband, and good rejection levels elsewhere.

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A Novel Compact Dual-Mode Filter Using Cross-Slotted Patch Resonator for Dual-Band Applications

Cited by 14 publications

References 10 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

Multi-Function Patch Element

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