Design of diplexers for E-Band Communication systems

Skaik, Talal; AbuHussain, Mahmoud

doi:10.1109/mms.2013.6663087

Cited by 10 publications

(15 citation statements)

References 7 publications

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“…For example, the use of capacitive iris discontinuities over inductive iris discontinuities is recommended because of the positive length of the impedance inverter making the resonator lengths larger. From these considerations, we have proposed a novel Ka-band diplexer topology that consists of halve the number of resonating structures when compared with similar diplexer circuits in the literature [3,4]. We achieve this by using a highpass filter/hybrid coupler topology in addition to a low order capacitive iris bandpass filter with full wavelength centre resonators.…”

Section: Resultsmentioning

confidence: 99%

“…Based on the required specifications in Table 1, a six pole bandpass filter was designed to operate in the frequency range of channel 1. This means that the proposed diplexer circuit uses halve the number of resonating structures when compared with other diplexer circuits that have a similar fractional bandwidth [3,4]. The filter was designed using the impedance inverter method as discussed in [6,9] using a commercial mode matching based software.…”

Section: Design Of Capacitive Iris Bandpass Filtersmentioning

confidence: 99%

“…This paper is a follow up to [1], where we proposed a novel Ka-band diplexer that can be fabricated using relaxed tolerances. However, it should be stressed that the novelty is associated with the diplexer circuit topology and not the frequency range: the design methodology will be particularly useful for the E-band diplexer design as in [3,4], or the new Q/V-band alphasat project [5]. The main benefit of our diplexer circuit is that it contains halve the number of resonating structures when compared with other diplexer circuits operating with a similar fractional bandwidth as a result of using only one bandpass filter [3,4].…”

Section: Introductionmentioning

confidence: 99%

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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: Resultsmentioning

confidence: 99%

Section: Design Of Capacitive Iris Bandpass Filtersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design of millimetre wave diplexers with relaxed fabrication tolerances

Aitken

2015

IET Microwaves, Antennas & Propagation

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“…Several diplexers were reported in the past [3][4][5][6][7][8][9][10][11]. A C-band diplexer is proposed in [3].…”

Section: Introductionmentioning

confidence: 99%

“…The design is based on a waveguide E-plane bifurcation junction with a scattering element to satisfy the wideband common port matching. Several H-plane and E-plane T-shaped junctions are proposed in [4][5][6][7]. These designs are based on waveguide cavity filters realized with metal inserts or with irises and a common three-port waveguide junction.…”

Section: Introductionmentioning

confidence: 99%

A Wideband Waveguide Diplexer for the Extend C-Band Antenna Systems

Wang¹,

Du²,

Wu³

et al. 2016

PIER C

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Abstract-A wideband diplexer for the extended C-band feed antenna system is proposed in this paper. The diplexer operates in the receiving band (Rx) 3.625-4.8 GHz and transmitting band (Tx) 5.85-7.025 GHz, which give 28% and 19% bandwidths at Rx and Tx bands, respectively. In order to cover such a broadband, a side coupling T-shaped junction and a corrugated low-pass filter scheme are adopted. The T-shaped junction and the filter are designed separately, and then combined for optimization. A prototype is fabricated and measured. Measured results show a good agreement with the calculated ones. The return loss is less than −21 dB, transmission loss less than 0.21 dB, Rx/Tx isolation better than 45 dB, and Tx/Rx isolation better than 70 dB.

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Microstrip triplexer using a common triple‐mode resonator

Eltokhy

Wang

2018

Micro & Optical Tech Letters

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GHz are obtained, respectively, in the simulation and measured responses. | C ONCL US I ONSThe third and fifth order microstrip LPFs are designed with folded line in place of high-impedance line. In addition to the reduction in overall size of filter by near about 10%, our simulated results have shown no effect on the cutoff frequency of filters with folded high-impedance line in comparison to the conventional LPF. Among the salient features, the lower insertion loss in pass band, higher sharp cutoff rate and higher attenuation in the stop band are obtained with the proposed LPF design. Results of fifth order simulated and measured LPF are found in good agreement. In future, these features can be further improved by utilizing 'C', 'X', or 'S' shaped folded line in addition to size reduction. ACKNOWLEDGMENTSThe authors thank the Research and Development Scheme 2015-2016 of the University of Delhi for the financial support and carrying out the present work. ORCID Kamlesh PatelAbstract An all-resonator based triplexer is presented using a double-stub-loaded resonator (DSLR) that acts as a F IGUR E 6 Comparison of simulated and measured responses: A, S 11 (dB), B, S 21 (dB) [Color figure can be viewed at wileyonlinelibrary. com] EL-TOKHY ET AL. | 1815 F IGUR E 6 Triplexer measurement versus simulation. (A) Transmission, (B) reflection, and (C) isolation between the three output ports [Color figure can be viewed at wileyonlinelibrary.com]

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Design of diplexers for E-Band Communication systems

Cited by 10 publications

References 7 publications

Design of millimetre wave diplexers with relaxed fabrication tolerances

Design of millimetre wave diplexers with relaxed fabrication tolerances

A Wideband Waveguide Diplexer for the Extend C-Band Antenna Systems

Microstrip triplexer using a common triple‐mode resonator

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