Compact broadband waveguide diplexer for satellite applications

Teberio, Fernando; Arregui, I.; Guglielmi, M.; Gomez-Torrent, Adrian; Soto, Pablo; Laso, M.A.G.; Boria, Vicente E.

doi:10.1109/mwsym.2016.7540231

Cited by 18 publications

(24 citation statements)

References 6 publications

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“…Meanwhile, the E-plane waveguide technology has been studied by many researchers and used in microwaves and millimeter waves applications [4]- [8], mainly because of the low losses and the possibility of selectivity of signals observed in their circuits using horizontal polarization. In particular, the use of such technology has enabled the development of many components such as stopband filters [8], bandpass filters [9], diplexers [10], [11] and multiplexers [6] on front-ends of transmitters and receivers of communications systems [12], [13]. However, because they are developed in waveguide structures, these components are heavy and large size.…”

Section: Simulation and Design Of A Bandpass Filtermentioning

confidence: 99%

Simulation and Design of a Bandpass Filter Based on Substrate Integrated E-Plane Waveguide

Costa

D’Assunção

Nascimento

2019

J. Microw. Optoelectron. Electromagn. Appl.

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This paper presents a bandpass filter based on a substrate integrated E-plane waveguide (SIEW) structure for wireless applications, at X-band. The SIEW geometry allows the development of new horizontally polarized filter topologies, unlike filter structures based on substrate integrated waveguide (SIW), which present vertical polarization (perpendicular to the ground plane). The simulation of the proposed SIEW filter is carried out using Ansoft HFSS software. To evaluate the performance of the proposed structure, the frequency behaviors of the scattering parameters are obtained for a horizontally polarized excitation. In the simulation, analyses are performed for the lossless and lossy (dielectric and metallic) cases, in order to compare the obtained results. The SIEW filter is fabricated and measured using a vector network analyzer (VNA). Measurement results are in agreement with simulation ones, validating the proposed filter design and topology. The fabricated prototype resonates at 10.54 GHz, with a bandwidth of 1.20 GHz, defined for a-3 dB transmission coefficient reference level. The SIEW filter structure is easy to design and manufacture and can be used in wireless communications systems that require components with ease integration into other planar structures.

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Section: Simulation and Design Of A Bandpass Filtermentioning

confidence: 99%

Simulation and Design of a Bandpass Filter Based on Substrate Integrated E-Plane Waveguide

Costa

D’Assunção

Nascimento

2019

J. Microw. Optoelectron. Electromagn. Appl.

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“…The RF feed chain of communication satellites uses architectures with high-performance diplexers (overall bandwidths much larger than 20 % and operation passbands larger than 5 %) to separate the transmission and reception bands and combine them in a common antenna [4]- [6]. There are many diplexers in the technical literature which are based on classical bandpass filters with either inductive or capacitive couplings [7]- [8], or metal inserts [9]- [10].…”

Section: Introductionmentioning

confidence: 99%

“…Lately, a high-power compact lowpass filter based on quarter-wave step-shaped bandstop elements separated by very short (ideally zero-length) waveguide sections has been proposed [14]. The performance of this novel structure has been compared with its classical counterparts in a high-performance diplexer showing that the size of the low-pass filter is dramatically reduced [6].…”

Section: Introductionmentioning

confidence: 99%

“…The aforementioned high-performance diplexer [6] uses, in the reception band, a classical inductive-iris filter designed with an optimum position of the couplings between the cavities to reduce the layout of the final diplexer. However, filters based on resonant cavities are more sensitive to manufacturing tolerances [15].…”

Section: Introductionmentioning

confidence: 99%

“…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%

See 2 more Smart Citations

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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Design of integrated wideband WR34‐band diplexer‐antenna array module for exploration of monolithic metal 3‐D printing for space applications

Vaitukaitis,

Rao,

Nai

et al. 2024

IET Microwaves Antenna & Prop

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The design of a wideband diplexer integrated with a 16‐slot Continuous Transverse Stub (CTS) antenna array is presented. The diplexer‐antenna array module covers the whole WR34 band. The Tx and Rx bands cover 21.7–26 and 27.5–33 GHz ranges, respectively. The diplexer is designed to have a 100 dB attenuation in the stopband and 40 dB isolation between the channels. The antenna array has a high gain, between 26.9 and 31 dBi, at the lowest and highest frequencies. For the preliminary exploration of monolithic metal 3‐D printing of complex geometry integrated RF front ends, two prototypes were manufactured in AlSi10 Mg. One‐piece fabrication eliminates complicated assembly, enhances reliability, and reduces weight, which is more desirable for space applications. Due to several factors, namely, an unpolished inner surface and imperfect printing quality, the diplexer had a poor measured performance. The measured results of the antenna array had a relatively better agreement with simulations. Although, the realised gain was affected by the much lower effective conductivity of the unpolished 3‐D printed material. Hence, the measured realised gain was between 27.8 and 30.9 dBi in the 29–33 GHz range.

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Compact broadband waveguide diplexer for satellite applications

Cited by 18 publications

References 6 publications

Simulation and Design of a Bandpass Filter Based on Substrate Integrated E-Plane Waveguide

Simulation and Design of a Bandpass Filter Based on Substrate Integrated E-Plane Waveguide

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

Design of integrated wideband WR34‐band diplexer‐antenna array module for exploration of monolithic metal 3‐D printing for space applications

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