Design of broadband directly coupled non-centred resonant irises filters

Barrio-Garrido, R.-M.; Llorente‐Romano, Sergio; García-Lampérez, Alejandro; Salazar-Palma, M.

doi:10.1109/eumc.2003.1262257

Cited by 4 publications

(3 citation statements)

References 3 publications

(2 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Maximizing the capabilities of filter structures that have highly stringent requirements is of great interest but also comes with great difficulty. In examples such as [6], [11], [20], [21], [22], [23], [24], [25], resonating irises (RIs) have been proposed as a means of maximizing the use of given filter structures for single-band or dual-band configurations. It is clear that the impact of these types of resonating irises can have a significant influence not only on the obtainable filtering characteristics, but also the resulting size and weight.…”

Section: Introductionmentioning

confidence: 99%

Improved TM Dual-Mode Filters With Reduced Fabrication Complexity

2023

View full text Add to dashboard Cite

This work presents an alternate and improved approach for the design of dual-mode filters that utilize transverse magnetic (TM) and nonresonating modes. The method that is proposed in this work allows for an improvement of the typical TM dual-mode filter design through the reformation of the coupling irises that connect the TM dual-mode cavity to the source/load waveguide ports, where the new interconnection means takes the form of resonate slot-irises. In this manner, a fourth-order quasi-elliptic response can be achieved within a very limited physical geometry and able to cover more than double the usable fractional bandwidth than previously reported. Furthermore, the selectivity and insertion loss of the filter response is significantly improved when compared to the typical single-cavity TM dual-mode filter response that uses coupling irises, while on the comparison of equal-order structures, a reduction in fabrication complexity and improved insertion loss is achieved. A characterization of the dimensional variations and effects of altering one of the source/load port positions in the proposed filter design is investigated in order to demonstrate notable effects on the rejection characteristics and positions of transmission zeros. A presentation on the design theory is given and formulations of various filter responses are examined. The fabrication of an experimental prototype with approximately 7.3% fractional bandwidth (FBW), centered at 90 GHz is conducted using high-precision computer numerical control (CNC) milling in order to demonstrate that the unique simplicity and overall compaction of this method can be easily applied at millimetre-wave frequencies without the need of tuning means. The results which are presented demonstrate highly accurate measurements throughout the W-band range, while an additional Q-factor analysis is provided in order to compare the improved filter scheme with other known design methodologies.

show abstract

Section: Introductionmentioning

confidence: 99%

Improved TM Dual-Mode Filters With Reduced Fabrication Complexity

2023

View full text Add to dashboard Cite

show abstract

“…The simple case of single aperture resonant irises used in waveguide band-pass lters is well-known [100,101]. This approach is based on direct coupled resonators synthesis.…”

Section: Wide-band Lter Synthesis and Designmentioning

confidence: 99%

Contribution to the analysis of waveguides and design of passive components at millimeter and submillimeter-waves

Sevillano¹

View full text Add to dashboard Cite

Acknowledgment Contents Contents List of Figures iii List of Tables x 2.4.10 Real part of the propagation constant for the fundamental mode of a parallel-plate waveguide with 2 mm height. Comparison of the exact, power loss and surface wave solution. . . . . . . . . . . . . . 2.5.1Error in the imaginary part of the propagation constant for the HE 11 mode of a circular waveguide; a (radius) is in mm. Dashed vertical lines are the cut-o frequencies of the rst higher-order mode, the T M 01 . (a) Error in the imaginary part of the ideal propagation constant. (b) Error in the imaginary part of the corrected propagation constant.

show abstract

“…In the technical literature we can also nd several examples of the use of resonant irises for wide-band lters in rectangular waveguide technology. For instance, wide-band band-pass lters with high selectivity have been proposed in [88] and [89], where the lter structures are based on the use of directly coupled resonant irises. Also, a directly coupled non-centered resonant irises lter has been discussed in [90], as shown in Fig.…”

Section: Resonant Aperturesmentioning

confidence: 99%

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

Sullca¹

View full text Add to dashboard Cite

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.

show abstract

Design of broadband directly coupled non-centred resonant irises filters

Cited by 4 publications

References 3 publications

Improved TM Dual-Mode Filters With Reduced Fabrication Complexity

Improved TM Dual-Mode Filters With Reduced Fabrication Complexity

Contribution to the analysis of waveguides and design of passive components at millimeter and submillimeter-waves

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

Contact Info

Product

Resources

About