Dielectric materials, devices, and circuits

Fiedziuszko, S.J.; Hunter, I.C.; Itoh, T.; Kobayashi, Yoshihiro; Nishikawa, Toshio; Stitzer, S.N.; Wakino, Kikuo

doi:10.1109/22.989956

Cited by 233 publications

(109 citation statements)

References 84 publications

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“…An alternative to all metallic waveguide filters is the use of circular dielectric resonators [3], [4], [5], [6], [7]. The use of these resonators, either in propagative [8] or in evanescent mode [9], [10] topologies, provides a reduction of around 50% in mass and volume [8], [9], an increase of thermal stability [11], [12], and, if the dielectric rods are all inductive or H plane, an increase of out-of-band rejection and better field distribution (lower voltage magnification factor), because the peaks of electric field within these filters are concentrated inside the dielectric posts, thus producing a smaller level of electromagnetic field, outside the dielectric posts, than in the case of the all metallic filters [13].…”

Section: Introductionmentioning

confidence: 99%

Radio‐frequency performance comparison of several H ‐plane rectangular waveguide filters loaded with circular dielectric posts

Bachiller¹,

Esteban²,

Díaz³

et al. 2016

IET Microwaves, Antennas & Propagation

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The paper presents a RF performance comparison between several H plane geometry filters based on rectangular waveguide technology. The basic all metal filter of resonant cavities is compared to filters loaded with circular dielectric resonators, either in propagative or evanescent mode. The use of these resonators is claimed to reduce the length of the filter, increase the rejection band until the first spurious frequency and to improve the voltage magnification factor (VMF), at the cost of increasing the losses. So, in order to properly asses and quantify the possible advantages of these filters, an accurate analysis of six of them has been developed. All the filters have been designed to have the same electrical response, and the length, losses, rejection band, VMF and fabrication cost for all the filters are compared.

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Section: Introductionmentioning

confidence: 99%

Radio‐frequency performance comparison of several H ‐plane rectangular waveguide filters loaded with circular dielectric posts

Bachiller¹,

Esteban²,

Díaz³

et al. 2016

IET Microwaves, Antennas & Propagation

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“…이러한 단 점을 극복하기 위해 삼중 모드를 가지는 구형(spherical) DR과 캐비티(cavity) 내부의 새로운 결합 네트워크(coupling network)를 이용한 여파기가 제안된 바 있다 [8] . [9], [10] . 구조, 크 기, 재료 등에 따라 형성되는 전․자계 분포에 따라 다양 한 공진 모드를 나타내며 특히, 통신장비에는 얇은 원통 형 퍽(puck) 형태의 DR을 주로 사용하는데, 마치 자계 다 이폴과 같은 전․자계 분포를 가지는 TE 01δ 모드가 주 모 드가 된다 [10], [11] .…”

Section: ⅰ 서 론unclassified

Compact Triple-Mode Bandpass Filter Using a Cylindrical Dielectric Resonator

Jang¹,

Park²,

Kim³

et al. 2015

The Journal of Korean Institute of Electromagnetic Engineering

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In this paper, the design of a compact triple-mode bandpass filter using a high-Q cylindrical dielectric resonator is proposed. In detail, the triple TE01δ modes along three orthogonal axes are used and novel coupling structure in the metallic enclosure is adopted to introduce the coupling between the resonant modes. Due to the cross coupling, the proposed bandpass filter has an asymmetric frequency response with flexible three transmission zeros, one of which can be located very close to the passband edge to provide an extremely sharp skirt characteristic with low insertion loss. The proposed filter is about 60 % miniaturized compared with conventional single-mode dielectric resonator filter. The proposed bandpass filter design is validated by the circuit and 3D EM simulations and measurements compared to the target specifications.

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“…These materials are key in realization of low-loss temperature-stable resonators, filters for satellite and broadcasting equipment, as well as in many other microwave devices [1][2][3]. The microwave measurements of dielectric properties have recently attracted more and more attention.…”

Section: Introductionmentioning

confidence: 99%

A Modified Formula for Microwave Measurement of Dielectric Loss Using a Closed Cylindrical Cavity Dielectric Resonator

Cao¹,

Cao²

2014

PIER Letters

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Abstract-This paper provides a modified formula for calculating dielectric loss of dielectric resonator of working in TE 01δ mode in closed cavity. The measurement system is divided into six regions. Based on analyzing the formula of loss tangent published in literatures, a quality factor of a substrate is created, and a modified formula is proposed. Validating the modified formula, with three substrates as supports, the frequencies and unloaded quality factors of dielectric resonators made of two sorts of dielectric materials with permittivity 38 and 75 respectively are measured using a closed cavity method. The measured results are compared with those obtained by other well-known formulas and show a good agreement with the result given by the parallel plate method.

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Dielectric materials, devices, and circuits

Cited by 233 publications

References 84 publications

Radio‐frequency performance comparison of several H ‐plane rectangular waveguide filters loaded with circular dielectric posts

Radio‐frequency performance comparison of several H ‐plane rectangular waveguide filters loaded with circular dielectric posts

Compact Triple-Mode Bandpass Filter Using a Cylindrical Dielectric Resonator

A Modified Formula for Microwave Measurement of Dielectric Loss Using a Closed Cylindrical Cavity Dielectric Resonator

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