Millimeter-Wave Three-Dimensional Substrate-Integrated OMT-Fed Horn Antenna Using Vertical and Planar Groove Gap Waveguides

Cao, Di; Li, Yujian; Wang, Junhong; Sun, Fanqi; Ge, Lei

doi:10.1109/tmtt.2021.3106643

Cited by 11 publications

(6 citation statements)

References 41 publications

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“…In waveguides, this combination of two linearly polarized orthogonal paths into a common guide or antenna is often referred to as an orthomode transducer (OMT), where two orthogonal rectangular waveguides are combined into a common square or circular waveguide. These types of structures have been made in both traditional waveguide and substrate integrated waveguide topologies [1]- [13]. These OMTs combine two or more waveguide paths into a common waveguide by bending orthogonal guides together [9], using a series of matching structures [4], [7], [8], probe feeding a horn from multiple points [12], through waveguide turnstiles [1]- [3], [6], [10], or other balanced structures [5], [13] where the common waveguide is fed symmetrically with pairs of single polarization waveguides.…”

Section: Introductionmentioning

confidence: 99%

“…These types of structures have been made in both traditional waveguide and substrate integrated waveguide topologies [1]- [13]. These OMTs combine two or more waveguide paths into a common waveguide by bending orthogonal guides together [9], using a series of matching structures [4], [7], [8], probe feeding a horn from multiple points [12], through waveguide turnstiles [1]- [3], [6], [10], or other balanced structures [5], [13] where the common waveguide is fed symmetrically with pairs of single polarization waveguides.…”

Section: Introductionmentioning

confidence: 99%

“…However, this asymmetric feed can result in an asymmetric ration pattern this was observed in [8] where two rectangular waveguides were brought into the corner of a horn antenna, or in [9] where two orthogonal paths were bent together, both producing asymmetric far-field patterns. Waveguide turnstiles, among other applications like circulators, can be used to combine two orthogonally polarized paths into a common guide in a balanced fashion [1], [2], [6], [10], [11], [14]- [17]. These types of structures feed each of the co-polarized paths with a power divider and phase matched lengths of waveguide to create a two port device (one for each of the orthogon paths) that feeds the common guide with symmetrically.…”

Section: Introductionmentioning

confidence: 99%

“…These types of structures feed each of the co-polarized paths with a power divider and phase matched lengths of waveguide to create a two port device (one for each of the orthogon paths) that feeds the common guide with symmetrically. These types of structures are difficult to machine and require CNC machining out of multiple parts [2], [6], multi-layer substrate integrated waveguide structures [1], or to be fabricated as a monolithic structure using additive manufacturing [10], [11].…”

Section: Introductionmentioning

confidence: 99%

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3-D Printed Dually Symmetric Orthomode Transducer and Horn Antenna at X-Band

Goode

Saavedra

2023

IEEE Open J. Antennas Propag.

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A dually symmetric orthomode transducer (OMT) and horn antenna are presented for both single port linearly polarized operation and dual port circular polarization use. The feed uses two waveguide splitters and a feed bend to feed a four-port horn antenna that has the two groups of ports orthogonal to each other to produce a symmetric radiation pattern. The feed is printed from 316L stainless steel while the horn is printed from a plastic polymer and metallized using aluminum tape. The structure is based on WR 90 waveguide and covers the guide's full operating band of 8.2 GHz to 12.4 GHz. Peak realized gain values of 20.5 dBi were measured with cross polarization rejection of over 40 dB. Here linearly polarized and circularly polarized results are presented, the latter using an off-the-shelf hybrid to control the phase for the two ports. Enabled by the symmetric feed, both the linear and circularly polarized radiation patterns were highly symmetric.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

3-D Printed Dually Symmetric Orthomode Transducer and Horn Antenna at X-Band

Goode

Saavedra

2023

IEEE Open J. Antennas Propag.

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“…7: The technological evolution of the gap waveguide based horn antennas. (a) An array of horn antennas fed by IMGW [82]; (b)RGW-based quasi-TEM H-plane horn launcher for leaky-wave antenna [76]; (c) SIGW-based H-plane horn antenna [83]; (d) GGW-based horn antenna[84]; and (e) 3D dual-polarized GGW-based horn antenna fed by OMT[85].…”

mentioning

confidence: 99%

An Overview of Recent Development of the Gap-Waveguide Technology for mmWave and sub-THz Applications

Yong¹,

Bagheri²,

Ven³

et al. 2023

Preprint

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<p>Interest in the mmWave and sub-THz bands for next-generation communication and radar systems is increasingly growing due to the available electromagnetic spectrum. This has led to an urgent need to develop low-loss and low-fabrication-cost technologies that perform well at these frequencies. The Gap Waveguide (GW) technology is an emerging and viable contender for the development of radio frequency passive components and antenna systems. The GW technology is based on the parallel-plate waveguide principle. According to Maxwell's equations, ideally, no wave propagates within a structure if the top plate consists of a perfect electric conductor (PEC) while the bottom plate is a perfect magnetic conductor (PMC), and the distance between the plates is less than a quarter wavelength. This PMC structure creates high surface impedance characteristics which provide cutoff to all propagating modes within the airgap. In practice, these magnetic conductors can be created artificially using an Electromagnetic Band Gap (EBG) structure. Based on this simple principle, considerable research and development of novel components with high performance has seen the light in the past decade. The purpose of this paper is to present an overview of current advancements in the design and technical implementations of GW-based antenna systems and components. Practical applications and the industry interest in the developments of the GW technology for mmWave and sub-THz applications have also been scrutinized.</p>

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