Design of waveguide bandpass filter using cascade inductive and capacitive irises

Akatimagool, Somsak; Intarawiset, Nattapong; Inchan, Surasak

doi:10.1109/apcap.2016.7843256

Cited by 5 publications

(2 citation statements)

References 4 publications

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“…For instance, in [34] a bandpass filter in Ku band has been designed using smallaperture irises for coupling the adjacent cavities. Inductive and capacitive irises are used for direct implementation of a C-band filter resonator in [35]. In [36], the use of twosided double-slot capacitive irises (resonant irises with more complex geometry) has been proposed.…”

Section: Introductionmentioning

confidence: 99%

Compact Wideband Hybrid Filters in Rectangular Waveguide With Enhanced Out-of-Band Response

Valencia

Boria

Guglielmi

et al. 2020

IEEE Trans. Microwave Theory Techn.

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This paper describes the design procedure of a compact wideband waveguide filter, based on stepped impedance resonators (SIR) and a combined usage of capacitive and inductive coupling irises, that provides a significant improvement in the out-of-band response of the filter with respect to the state-ofthe-art. In addition to theory, several filter prototypes have been designed and manufactured. A detailed sensitivity analysis has been also carried out. Finally, simulations and measurements are compared, showing very good agreement, thereby fully validating the new filter topology. Index Terms-Aggressive space mapping, band-pass filters, hybrid (inductive and capacitive) irises, stepped impedance resonator and wideband.

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Section: Introductionmentioning

confidence: 99%

Compact Wideband Hybrid Filters in Rectangular Waveguide With Enhanced Out-of-Band Response

Valencia

Boria

Guglielmi

et al. 2020

IEEE Trans. Microwave Theory Techn.

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“…Also, a C-band lter has been designed in [64], where both inductive and capacitive irises are used. The use of two-sided double-slot capacitive irises (that are resonant irises with more complex geometry) has been proposed in [65].…”

Section: Improved Inductive Filtersmentioning

confidence: 99%

New Wide-Band Capacitive Filter Structures in Rectangular Waveguide Technology With Enhanced Out-of-Band Response

Sullca¹

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The main objective of this doctoral thesis is the development of new capacitive ltering structures in rectangular waveguide that are able to provide wide bandwidths in the passband and improve, at the same time, the out-of-band response. These new guided structures have been developed in order to oer new technological solutions for high-frequency microwave lters, with a variety of dierent transfer functions, addressing specically the needs of future telecommunication systems for both ground and space applications.In this context, therefore, we discuss in this document the study, design and manufacture of several types of microwave lter in rectangular waveguide that show a signicant improvement with respect to the state-of-the-art. The new solutions that we propose are obtained by introducing simple modications in the structure of classic microwave lters. Several techniques based on hybrid irises, stepped impedance resonators, staircase conguration and E-plane T-junctions with shorted stubs or manifold connections, are successfully used in order to meet the very demanding specications of future systems for both ground and space applications. Furthermore, an additional current challenge faced by all designers of microwave components is the need to reduce both their physical size and mass (or weight). To address this issue, we discuss in this document the use of resonant apertures in rectangular waveguide, introducing a new family of lters which can be used to implement complex single and dual-band transfer functions with signicant size and mass reduction.In the following chapters of this doctoral thesis, each subject is discussed in detail including the basic theoretical formulations, design procedures, the results of full-wave electromagnetic simulations, manufacturing considerations, and the measured performance of a number of prototypes. Excellent agreement is found in all cases between measurement and simulations, thereby fully validating both the novel structures discussed and their design procedures.

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Cascaded suspended substrate stripline bandpass filter

Alaqil

Hong

2018

Micro & Optical Tech Letters

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A new design of bandpass filter on a single layer implemented by using high Q suspended substrate stripline (SSS) structure is proposed. The designed filter is composed of cascaded highpass (HPF) and lowpass (LPF) filters, which forms a passband with a fractional bandwidth of 21.4% centered at 1.58 GHz and exhibits a very good selectivity through two transmission zeros. The simulated and measured results show a good agreement over the bandwidth with the in‐band insertion and return losses of 0.31 dB and 17.7 dB, respectively.

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Design of waveguide bandpass filter using cascade inductive and capacitive irises

Cited by 5 publications

References 4 publications

Compact Wideband Hybrid Filters in Rectangular Waveguide With Enhanced Out-of-Band Response

Compact Wideband Hybrid Filters in Rectangular Waveguide With Enhanced Out-of-Band Response

New Wide-Band Capacitive Filter Structures in Rectangular Waveguide Technology With Enhanced Out-of-Band Response

Cascaded suspended substrate stripline bandpass filter

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