A microstrip diplexer filter using stepped-impedance resonators

Puttadilok, D.; Eungdamrong, Duangrat; Amornsaensak, S.

doi:10.1109/sice.2008.4654622

Cited by 8 publications

(2 citation statements)

References 15 publications

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“…To achieve high isolation and compact size diplexer, the variable frequency response of stepped-impedance resonators (SIR) is applied to realize the diplexer if their fundamental and the first spurious resonant frequency are properly assigned [11]. Microstrip diplexers, due to the low profile, light weight, low cost, and easy integration with other front-end circuitry, have recently become more and more popular [14] [15]. It is, however, a challenging task to design microstrip diplexers with low inband losses for both channels and good isolation between them while keeping a small size.…”

Section: Introductionmentioning

confidence: 99%

Design of RF Diplexer for Mobile Communication

Brinda¹,

Parveen²

2014

IJCA

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In this paper, a matching circuit for RF diplexer for mobile communication is proposed. Most wanted bands in wireless technologies like GSM and DCS is used. Both bands are designed by using stepped impedance resonators with single order and matching between this two are implemented by Yjunction method. Cutoff frequency for GSM and DCS band are 925 MHz and 1795 MHz. Microstrip Technology is proposed because it provides a better insertion loss, better return loss and good isolation between the passbands. The isolation between two operating bands is better than -50 dB. The overall insertion loss obtained in diplexer is -0.4 dB. The overall return loss is less than -20 dB.

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Section: Introductionmentioning

confidence: 99%

Design of RF Diplexer for Mobile Communication

Brinda¹,

Parveen²

2014

IJCA

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“…However, their size was still bulky [11,12]. In recent years, parallel-coupled microstrip filters using stepped-impedance resonators (SIR) were reported to reduce their size [13][14][15]. However, these dual-band filters still have some limitations in terms of their sizes and insertion loss.…”

Section: Introductionmentioning

confidence: 99%

A Compact LTCC Dual-Band WLAN Filter using Two Notch Resonators

Park¹,

Cheon²,

Park³

2013

Journal of Electrical Engineering and Technology

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-This paper presents compact dual-band WLAN filter and filter module. They were developed by embedding all of the passive lumped elements into a LTCC substrate. In order to reduce the size/volume of the filter and avoid EM parasitic couplings between the passive elements, the proposed filter was designed using a 3rd order Chebyshev circuit topology and J-inverter transformation technology. The 3rd order Chebyshev bandpass filter was firstly designed for the bandselection of the 802.11b and was then transformed using finite transmission zeros technologies. Finally, the dual-band filter was realized by adding two notch resonators to the 802.11b filter circuit for the band-selection of the 802.11a/g. The maximum insertion losses in the lower and higher passbands were better than 2.0 and 1.3 dB with minimum return losses of 15 and 14 dB, respectively. Furthermore, the filter was integrated with a diplexer to clearly split the signals between 2 and 5 GHz. The maximum insertion and minimum return losses of the fabricated module were 2.2 and 14 dB at 2.4 -2.5 GHz, and 1.6 and 19 dB at 5.15 -5.85 GHz, respectively. The overall volume of the fabricated filter was 2.7 × 2.3 × 0.59 mm3.

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Microstrip Diplexer Using Stepped Impedance Resonators

Chinig

Zbitou

Errkik

et al. 2015

Wireless Pers Commun

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International audienceIn this paper, a compact diplexer based on coupled stepped impedance resonators (SIRs) is designed for Digital Communication System and the industrial, scientific and medical applications. The diplexer is composed from two band-pass filters operated at 1.8 and 2.45 GHz respectively. The size and the position of the SIR and the feed lines are determined through the theoretical design and the simulation. The diplexer has less than 2.2 dB insertion loss and more than 21 dB of isolation. The diplexer performances are investigated numerically by using Momentum ADS Agilent and CST microwave software.The electromagnetic simulated results of the proposed diplexer show a good agreement with the measured results

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A microstrip diplexer filter using stepped-impedance resonators

Cited by 8 publications

References 15 publications

Design of RF Diplexer for Mobile Communication

Design of RF Diplexer for Mobile Communication

A Compact LTCC Dual-Band WLAN Filter using Two Notch Resonators

Microstrip Diplexer Using Stepped Impedance Resonators

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