Compact Open-Loop Uwb Filter With Notched Band

Hsiao, Pai‐Yi; Weng, Ro-Min

doi:10.2528/pierl09022501

Cited by 30 publications

(16 citation statements)

References 5 publications

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“…Trilayer structures were adopted to minimize the sizes of UWB BPFs. A complicated C-shaped structure was proposed for a small UWB BPF with WLAN notch band [20]. Two pairs of open-loop resonators on the top layer and one coupled resonator on the bottom layer was proposed [21] The size reduction can be achieved successfully by tri-layer structure.…”

Section: Introductionmentioning

confidence: 99%

Compact Tri-Layer Ultra-Wideband Bandpass Filter With Dual Notch Bands

Hsiao¹,

Weng²

2010

PIER

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Abstract-A compact ultra-wideband (UWB) bandpass filter (BPF) with dual notch bands is presented using a tri-layer structure. In the design of UWB BPFs, it is desired to have a uniform 3.1 GHz to 10.6 GHz full-band transmission response. Dual notch bands are generated for filtering out the interferences caused by strong signals transmitted from WLAN and/or WiMAX systems at 5.8 GHz and 3.5 GHz, respectively. The sharp rejection of WiMAX signals is achieved by adding meander open-loop resonators on the middle layer. Another rejection of WLAN signals is introduced by adding a Cshaped resonator on the bottom layer. The proposed filter is not only realized theoretically but also verified by a full-wave electromagnetic simulation. The designed tri-layer UWB BPF with dual notch bands was fabricated by two FR4 printed circuit boards with the permittivity of 4.4 and the thickness of 0.8 mm. The total area is 11 mm × 10.5 mm.

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Section: Introductionmentioning

confidence: 99%

Compact Tri-Layer Ultra-Wideband Bandpass Filter With Dual Notch Bands

Hsiao¹,

Weng²

2010

PIER

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“…External magnetic tuning of MIC devices fabricated on the ferrite substrate finds applications for removal of spurious frequencies and is the need of present day mobile and satellite communication systems [1][2][3][4][5]. Most of the magnetically tuned microwave devices reported have been realized on bulk ferrites and require sufficiently large external dc magnetic field to alter the device S-parameters.…”

Section: Introductionmentioning

confidence: 99%

Em Transmission Response of Microstrip Notch Filter on Obliquely Magnetized Magneto-Dielectric Substrate in Xband Under Influence of Low Magnitude of External Dc Magnetic Field

Borah¹,

Bhattacharyya²

2011

PIER M

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Abstract-A tunable microwave notch filter is developed on magnetodielectric material having low saturation magnetization to attain low external dc magnetic field for biasing. A simple microstrip line at 10 GHz is developed on nickel ferrite/low density polyethylene nanocomposite system as substrates and its microwave transmission response is studied in X-band. Composite system is developed by dispersing nano sized nickel ferrite (∼6.63 nm) in low density polyethylene to obtain a homogeneous flexible substrate. Saturation magnetization of 4% volume fraction of the composite is found to be 1.8745 emu/g. Tunability of Q value and insertion loss is studied with magnitude of external dc magnetic field and at different angles of its orientation with the axial plane. A very low field up to 250 G is sufficient to tune the selectivity. An insertion loss of ∼ −30 dB and Q ∼ 375 at 10.2 GHz is observed. The interaction of magneto static modes with orientation of the applied dc magnetic bias with respect to rf magnetic field is discussed with couple mode theory. Good cutoff behaviour of more than 28 dB is observed at magnetic field angles from 23.52 • to 34.21 • . The experimental and theoretical couplings show close proximity.

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“…Realization of band notched UWB BPF is a feasible solution to eliminate the problem of interference with other narrow band applications, as compared to the use of extra filter. In [9,10] open loop resonators are etched in the transition structure of a UWB BPF to produce notched bands. In [11,12], a narrow notched band is produced by introducing an external loaded stepped-impedance resonator.…”

Section: Introductionmentioning

confidence: 99%

Band-Notched Ultra-Wideband Bandpass Filter Using Dual-Mode Resonator Loaded Slotline

Guan¹,

Xiong²,

Yang³

et al. 2014

PIER Letters

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Abstract-In this article, a novel band-notched ultra-wideband (UWB) bandpass filter based on hybrid microstrip/slotline structure is proposed. A quad-mode stubs-loaded slotline resonator is fed by two orthogonal microstrip lines and ultra-wideband bandpass characteristic is excited. A stub-loaded dualmode microstrip resonator is externally loaded to the quad-mode slotline resonator, and a notched band with sharp roll-off characteristic is achieved. The circuit model for the dual-mode microstrip resonator loaded slotline is given and analyzed. The proposed filter is designed and fabricated. Simulated and measured return losses are −12 dB/−18 dB and −18 dB/−10 dB in lower and higher passband. The return loss in the notched band is greater than 15 dB.

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Compact Open-Loop Uwb Filter With Notched Band

Abstract: The suppression at 5.8 GHz is larger than 15 dB. The proposed configuration is proved to be both simple and compact.

Cited by 30 publications

References 5 publications

Compact Tri-Layer Ultra-Wideband Bandpass Filter With Dual Notch Bands

Compact Tri-Layer Ultra-Wideband Bandpass Filter With Dual Notch Bands

Em Transmission Response of Microstrip Notch Filter on Obliquely Magnetized Magneto-Dielectric Substrate in Xband Under Influence of Low Magnitude of External Dc Magnetic Field

Band-Notched Ultra-Wideband Bandpass Filter Using Dual-Mode Resonator Loaded Slotline

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