Copper/benzocyclotene thin film technique based microstrip bandpass filter featured by thick dielectric layer for low insertion loss

In this paper, a dual band microstrip bandpass filter has been proposed utilizing three edge coupled resonators, interdigital stubs and DGS technique. To enhance the coupling degree, two interdigital coupled feed lines are employed in this filter. The suppressing cell consists of stepped impedance ladder type resonators, which provides a wide stopband. The proposed suppressing cell has clear advantages like low insertion loss in the passband and suitable roll off. The frequency response of the filter looks like a standard dual band band-pass filter. The filter exhibits a dual passband with resonant frequencies at 2.2GHz and 3.45GHz covers LTE1 and LTE22 bands.

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Miniaturized Dual-Band Bandpass Filter Using Embedded Dual-Mode Resonator with Controllable Bandwidths

Frequenz ◽

10.1515/freq-2015-0195 ◽

2016 ◽

Vol 70 (9-10) ◽

Author(s):

Chuanming Zhu ◽

Jin Xu ◽

Wei Kang ◽

Zhenxin Hu ◽

Wen Wu

Keyword(s):

Insertion Loss ◽

Degrees Of Freedom ◽

Bandpass Filter ◽

The Other ◽

Dual Band ◽

Dual Mode ◽

Transmission Zeros ◽

Low Insertion Loss ◽

Multiple Transmission ◽

Mode Resonator

AbstractIn this paper, a miniaturized dual-band bandpass filter (DB-BPF) using embedded dual-mode resonator (DMR) with controllable bandwidths is proposed. Two passbands are generated by two sets of resonators operating at two different frequencies. One set of resonators is utilized not only as the resonant elements that yield the lower passband, but also as the feeding structures with source-load coupling to excite the other to produce the upper passband. Sufficient degrees of freedom are achieved to control the center frequencies and bandwidths of two passbands. Moreover, multiple transmission zeros (TZs) are created to improve the passband selectivity of the filter. The design of the filter has been demonstrated by the measurement. The filter features not only miniaturized circuit sizes, low insertion loss, independently controllable central frequencies, but also controllable bandwidths and TZs.

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Low Insertion Loss Microwave Ultrasonic Delay Device Using a ZnO Thin Film Transducer

Journal of Applied Physics ◽

10.1063/1.1657330 ◽

1969 ◽

Vol 40 (12) ◽

pp. 4983-4984 ◽

Cited By ~ 1

Author(s):

R. M. Malbon ◽

M. T. Wauk ◽

D. K. Winslow

Keyword(s):

Thin Film ◽

Insertion Loss ◽

Zno Thin Film ◽

Low Insertion Loss ◽

Film Transducer

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Dual-band bandpass filter with wide stopband and low insertion loss for GNSS signals

2016 IEEE MTT-S Latin America Microwave Conference (LAMC) ◽

10.1109/lamc.2016.7851257 ◽

2016 ◽

Cited By ~ 1

Author(s):

Ramon Lopez La Valle ◽

Javier G. Garcia ◽

Pedro A. Roncagliolo

Keyword(s):

Insertion Loss ◽

Bandpass Filter ◽

Dual Band ◽

Low Insertion Loss

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Microstrip Bandpass Sensor Based on Distributed Capacitors

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.324.445 ◽

2011 ◽

Vol 324 ◽

pp. 445-448

Author(s):

Zeina Melhem ◽

Chadi Nader ◽

B. Bayard ◽

J. Bechara ◽

Jean Jacques Rousseau

Keyword(s):

Insertion Loss ◽

Dielectric Layer ◽

Large Study ◽

Bandpass Filter ◽

Dielectric Material ◽

Good Prediction ◽

Dielectric Characterization ◽

Circuit Simulator ◽

Prototype Filter ◽

Rectangular Patch

A microstrip bandpass filter with rectangular patch coupled resonator is presented. The filter is designed to be more affected by the dielectric layer above the conductors compared to the same type of parallel-coupled bandpass filter. The filter is designed to operate between 1 GHz to 3 GHz and this can be a sensor base on distributed capacitors. The agreement between the circuit simulator and measured results is excellent and gives a very good prediction for the filter characteristics. The aim of this prototype filter is to show insertion loss (IL) at the bandpass transmission response when a dielectric material is above or near the conductors. A large study around the sensibility and the effect of the dielectric layer is done in order to evaluate its performance in detection and dielectric characterization.

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