The Corrugated-Waveguide Sand-Pass Filter - A New Type of Waveguide Filter

Hauth, Wolfgang; Keller, Reinhard; Rosenberg, Uwe

doi:10.1109/euma.1988.333930

Cited by 10 publications

(9 citation statements)

References 4 publications

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“…The design of highpass filters in rectangular waveguide can be achieved by equating the cut off frequency of the waveguide to the cut off frequency of the highpass filter [10]. Thus, knowledge of the traditional prototype circuit for filter design is not required here as waveguide naturally acts as a highpass filter: only knowledge of the propagation constant for a particular mode is required.…”

Section: Design Of Highpass Filtersmentioning

confidence: 99%

Design of millimetre wave diplexers with relaxed fabrication tolerances

Aitken

2015

IET Microwaves, Antennas & Propagation

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A novel millimetre wave waveguide diplexer topology that can be fabricated using relaxed fabrication tolerances is presented. This is achieved by using a highpass filter/hybrid coupler topology in addition to a low order capacitive iris bandpass filter. By targeting the most sensitive centre resonators in the bandpass filter and increasing their length to full wavelength, the sensitivity to fabrication errors associated with changes to the resonator length can be reduced without the introduction of spurious responses close to the passband. The main benefit of this topology is that only one bandpass filter is required to realise the final diplexing response. This is advantageous when tolerance is considered as it is found that resonating structures associated with bandpass filters contribute to tolerance effects. In addition to this, the authors find that the choice of iris discontinuity used to realise the impedance inverters in the bandpass filter can help to relax fabrication tolerances. By subjecting the proposed circuit to a tolerance analysis, simulated results suggest that the circuit can be fabricated with relaxed fabrication tolerances. These discussions are verified with the fabrication of a Kaband waveguide diplexer, where the measured and simulated scattering parameters are in very good agreement.

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Section: Design Of Highpass Filtersmentioning

confidence: 99%

Design of millimetre wave diplexers with relaxed fabrication tolerances

Aitken

2015

IET Microwaves, Antennas & Propagation

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“…Design equations for a cut of frequency highpass filter can be found in [8]. In order to match the highpass filter to the hybrid coupler, a third order inhomogeneous transformer was designed using the methods in [9].…”

Section: A Highpass Filtermentioning

confidence: 99%

Tolerance considerations for wireless backhaul diplexer circuits

Aitken

2014

2014 44th European Microwave Conference

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A novel topology is presented which can relax fabrication tolerances associated with an E-band waveguide diplexer circuit. This is achieved by using a narrow wall short slot coupler/highpass filter configuration, in addition to a low order bandpass filter which reduces the required number of resonating structures by halve when compared to other E-band diplexers in the literature. This is advantageous when tolerance is considered as it is found that resonating structures associated with bandpass filters contribute to fabrication sensitivity. In addition to this, it is found that capacitive iris coupling has benefits over inductive iris coupling due to the positive length of the impedance inverter.

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“…In this paper, two novel waveguide band-pass filters, susceptible to be fabricated using relaxed fabrication tolerances, are utilized to meet the Ku-band transmission (Tx) and reception (Rx) band specifications of a very compact high-performance diplexer with very stringent specifications for satellite applications. The aforementioned novel band-pass filters are designed by combining a low-pass waveguide filtering function following the technique described in [6], and a high-pass filtering function based on the cut-off effect [20] (Section II). Unlike [20], where both the height and length of the corrugations are design parameters, the design variables are only the height of the bandstop elements (since the required return loss is achieved with the matching networks, which are also necessary to match the input/output block filter to the standard waveguide port dimensions).…”

Section: Introductionmentioning

confidence: 99%

High-Performance Compact Diplexers for Ku/K-Band Satellite Applications

Teberio

Arregui

Soto

et al. 2017

IEEE Trans. Microwave Theory Techn.

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In this paper, a very compact high-performance diplexer for satellite applications is presented. The diplexer has an overall bandwidth up to 50 %, and is composed of two novel band-pass filters (around 20 % and 7 % of relative bandwidth each one) joined together with an E-plane T-junction. The novel band-pass filters are designed by combining a low-pass filtering function (based on λ/4-step-shaped bandstop elements separated by very short waveguide sections) and a high-pass filtering structure (based on the waveguide propagation cutoff effect). The transmission band-pass filter provides the suppression of the higher-order modes over the reception band. The novel diplexer shows a very compact footprint and benefits of relaxed manufacturing tolerances. Moreover, it also achieves a very wide stopband for the reception channel and high-power operation. The final diplexer has been fabricated by milling, and the measurements of the device show a very good agreement with simulations, demonstrating the validity and manufacturing robustness of the proposed topology for stringent specifications.

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The Corrugated-Waveguide Sand-Pass Filter - A New Type of Waveguide Filter

Cited by 10 publications

References 4 publications

Design of millimetre wave diplexers with relaxed fabrication tolerances

Design of millimetre wave diplexers with relaxed fabrication tolerances

Tolerance considerations for wireless backhaul diplexer circuits

High-Performance Compact Diplexers for Ku/K-Band Satellite Applications

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