Integrated ceramic waveguide filters with improved spurious performance

Hunter, I.C.; Afridi, Sharjeel; Sandhu, Muhammad Yameen

doi:10.1109/eumc.2015.7345853

Cited by 13 publications

(14 citation statements)

References 6 publications

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“…A six pole integrated ceramic waveguide filter is designed with non-uniform width resonators having following specification; The inter-resonator and external couplings are achieved via metal plated through holes and coaxial probes, respectively as described in [11]. The non-uniform width ceramic resonators improves the overall stop band performance up to 1.85* without degrading the overall response and selectivity of filter.…”

Section: Chebyshev Integrated Ceramic Waveguide Filter With Non-mentioning

confidence: 99%

“…This mix resonator approach gives further volume reduction at the cost of increased pass band insertion loss (of 1.3 dB). The input/output and inter resonator coupling follow the same procedure as defined in [11]. This filter combines the effect of TEM and non-uniform width resonators to offer stop band attenuation window of 72dB up to 3.45 GHz, which makes it 1.87 times of .…”

Section: Chebyshev Integrated Ceramic Waveguide Filter With Tem Dmentioning

confidence: 99%

“…Combline and mixed combline approach used to enhance the out of band performance is reported in [9,10]. In a recent paper published by the authors [11] the spurious performance of a uniform width ceramic waveguide filter was improved by introducing the concept of ceramic TEM resonator and ceramic step impedance resonator. Both of these techniques increase the spurious free bandwidth of ceramic waveguide filters but degrade the Q-factor of uniform width ceramic waveguide filter significantly.…”

Section: Introductionmentioning

confidence: 99%

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Monolithic ceramic waveguide filter with wide spurious free bandwidth

Afridi

Sandhu

Somjit

et al. 2016

2016 46th European Microwave Conference (EuMC)

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Abstract-This paper presents two new design techniques forimproving the spurious performance of an integrated ceramic waveguide filter without compromising its figure-of-merit e.g. Q-factor. Nonuniform width ceramic waveguide resonators are used to spread the undesired higher order mode frequencies along with ceramic TEM resonators reducing the overall cutoff frequency of the resonators. The proposed designs offer 60-65% better spurious performance in comparison with uniform width integrated ceramic waveguide filter. Simulated results for a six pole Chebyshev integrated non-uniform width ceramic waveguide filter and an integrated evanescent mode non-uniform width ceramic waveguide filter are presented in this paper showing improved spurious performance.

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Section: Chebyshev Integrated Ceramic Waveguide Filter With Non-mentioning

confidence: 99%

Section: Chebyshev Integrated Ceramic Waveguide Filter With Tem Dmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Monolithic ceramic waveguide filter with wide spurious free bandwidth

Afridi

Sandhu

Somjit

et al. 2016

2016 46th European Microwave Conference (EuMC)

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“…An evanescent mode ceramic waveguide resonator consists of a rectangular ceramic block with a metal-plated hole at the centre of its broad dimension [3]. The metal-plated hole dimensions has a significant effect on fundamental and higher order modes of the resonator.…”

Section: B Evanescent Mode Ceramic Waveguide Resonatormentioning

confidence: 99%

“…Many techniques have been used to improve the stop band performance of waveguide filters. Ceramic TEM and Ceramic filled waveguide filter provided a good way of dealing with the spurious problem as well as maintaining considerable miniaturization [3]. Combline and mixed combline resonators were used to increase the stop band attenuation in [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Mixed non-uniform width/evanescent mode ceramic resonator waveguide filter with wide spurious free bandwidth

Afridi

Sandhu

Hunter

2016

2016 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)

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Abstract-This paper presents a method to improve the spurious performance of integrated ceramic waveguide filters. Nonuniform width ceramic waveguide resonator and evanescent mode ceramic resonators are employed together to the resonant frequencies of higher order modes. The proposed designs give 75% improvement in stop band response when compared to uniform width ceramic waveguide filter. Simulated results of two six pole chebyshev filters are presented here with improved stop band performance.

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Development of monoblock TM dielectric resonator filters with additive manufacturing

Carceller

Gentili

Reichartzeder³

et al. 2017

IET Microwaves, Antennas & Propagation

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Transverse magnetic (TM) dielectric resonator filters are frequently affected by a poor contact in the interface between metal and ceramic walls, misalignment of the ceramic parts, and cracks due to mechanical stress. To overcome these issues, the present study proposes the development of monoblock filters fabricated by lithography‐based ceramic manufacturing. To build these structures with additive manufacturing, some geometrical changes, with respect to the classical assembly, have to be applied. The effect of these changes on the electrical performance of a stand‐alone resonator are studied. Then, a filter prototype is manufactured and measured to validate the feasibility of this approach.

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Integrated ceramic waveguide filters with improved spurious performance

Cited by 13 publications

References 6 publications

Monolithic ceramic waveguide filter with wide spurious free bandwidth

Monolithic ceramic waveguide filter with wide spurious free bandwidth

Mixed non-uniform width/evanescent mode ceramic resonator waveguide filter with wide spurious free bandwidth

Development of monoblock TM dielectric resonator filters with additive manufacturing

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