Broad-band transition from a coaxial-line to a rectangular waveguide with reduced-height

Liao, Ao; Wang, Hongtao; Wang, Baoxin; Wang, Zheyu

doi:10.1109/icmmt.2008.4540378

Cited by 7 publications

(6 citation statements)

References 3 publications

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“…Reduced waveguide height is required in microwave communication systems because of its smaller size and reduced cost. By increasing the height of the waveguide near the coaxial probe, bandwidth got increased compared to the standard waveguide [10]. The aperture antennas (horn antenna) are capable of producing a very high gain of 20-22dB with high directionality.…”

Section: Paper Reviewmentioning

confidence: 97%

Design, Implementation, Simulation of a Pyramidal Horn Antenna Excited with Various Top-Hat Loaded Monopoles

Makam¹,

Kulkarni²

2013

2013 5th International Conference on Computational Intelligence and Communication Networks

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This paper presents the design and simulation of a wideband, medium gain, light weight, wide bandwidth pyramidal horn antenna feed for microwave applications. The horn was designed using approximation method to calculate the gain in mat lab and simulated using CST microwave studio. The proposed antenna operates within 1-2 GHz (L-band). The horn is supported by a rectangular waveguide.It is linearly polarized and shows wide bandwidth with a gain of 15.3dB. The horn is excited with the monopole which is loaded with various top hat loading such as rectangular disc, circular disc, annular disc,L-type, T-type, Cone shape, U-shaped plates etc. and checked their performances for return loss as well as bandwidth. The circular disc and annular ring gives the low return loss and wide bandwidth as well as low VSWR. The annular ring gave good VSWR and return loss compared to the circular disc. The far field radiation pattern is obtained as well as Efield & H-field analysis for L -band pyramidal horn has been observed, simulated and optimized using CST Microwave Studio. The simulation results show that the pyramidal horn structure exhibits low VSWR as well as good radiation pattern over L-band.

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Section: Paper Reviewmentioning

confidence: 97%

Design, Implementation, Simulation of a Pyramidal Horn Antenna Excited with Various Top-Hat Loaded Monopoles

Makam¹,

Kulkarni²

2013

2013 5th International Conference on Computational Intelligence and Communication Networks

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“…This CWT achieved a reflection coefficient of less than −20.8 dB at 5.0-7.5 GHz. Another work by Liao and coworkers [6] implemented a similar structure for a transition with an input waveguide of a × b = 28.5 mm × 7.61 mm and an output waveguide of a × b = 28.5 mm × 5.5 mm. These dimensions of the reduced-height CWT were obtained by numerical optimization for a return loss of greater than 30 dB at 6.1-10.6 GHz.…”

Section: Review Of Existing Workmentioning

confidence: 99%

“…The results achieved are summarized in Table 3 below with a comparison to previous works [5][6][7][8][9][10][11][12]. We included the performance of a commercial half-height waveguide adapter by Tei Teng Wireless Co., shown in Figure 13.…”

Section: Designmentioning

confidence: 99%

Design of a Broadband Transition from a Coaxial Cable to a Reduced-Height Rectangular Waveguide

Dansran,

Xu,

Heo

et al. 2023

Applied Sciences

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For miniaturization, rectangular waveguides with a reduced height are often required, along with a coaxial transition for signal launching. We present a simulation-based design of a broadband transition from a coaxial cable to a rectangular waveguide with the height(b)-to-width(a) ratio b/a ranging from 0.125 to 0.375. The proposed transition consists of a coaxial probe with a cylindrical head or a disk and two symmetrically placed tuning posts. To extend the operating frequency range, three sections of the rectangular waveguide are employed with properly chosen dimensions. Design examples are presented for the WR75 waveguide transition with a b/a of 0.125, 0.25, and 0.375, having a bandwidth of 83.4%, 92.7%, and 84.4%, respectively. Compared with previous works, our design offers the largest bandwidth in a right-angle coaxial-to-rectangular waveguide transition employing the aforementioned structure.

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“…This mode conversion is traditionally implemented with right‐angle transitions, where a coaxial electrical probe enters the waveguide through one of its broad walls . This solution provides easy design and assembly and obtains good performance in terms of return loss and bandwidth.…”

Section: Introductionmentioning

confidence: 99%

“…This mode conversion is traditionally implemented with right-angle transitions, where a coaxial electrical probe enters the waveguide through one of its broad walls. 1,2 This solution provides easy design and assembly and obtains good performance in terms of return loss and bandwidth. It is worth mentioning that broadband transitions are realized at the expense of increased size, since quarter-wave multistep impedance transformers are typically employed for wideband impedance matching.…”

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confidence: 99%

In‐line stepped ridge coaxial‐to‐rectangular waveguide transition with capacitive coupling

Gatti

Rossi

Dionigi

2018

Int J RF Microw Comput Aided Eng

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An original in‐line coaxial‐to‐rectangular waveguide transition including stepped ridged sections is presented. This device differs from the state of the art because of the coaxial inner conductor not being in electrical contact with the ridge, leading to considerable mechanical advantages. In addition to this, capacitive coupling can extend the bandwidth even with a few matching sections when compared with the traditional counterpart presenting DC contact with the first ridge. An ultra‐compact transition is designed, manufactured, and tested in back‐to‐back configuration. From measured data, a return loss better than 20 dB on a bandwidth of 1.27 GHz (12.2%) is observed in this configuration. An average insertion loss of 0.11 dB can be derived for the standalone transition.

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Broad-band transition from a coaxial-line to a rectangular waveguide with reduced-height

Cited by 7 publications

References 3 publications

Design, Implementation, Simulation of a Pyramidal Horn Antenna Excited with Various Top-Hat Loaded Monopoles

Design, Implementation, Simulation of a Pyramidal Horn Antenna Excited with Various Top-Hat Loaded Monopoles

Design of a Broadband Transition from a Coaxial Cable to a Reduced-Height Rectangular Waveguide

In‐line stepped ridge coaxial‐to‐rectangular waveguide transition with capacitive coupling

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