Cruciform Directional Couplers in H-Plane Rectangular Waveguide

Ohta, Isao; Yumita, Yoshihiro; Toda, K.; Kishihara, Mitsuyoshi

doi:10.1109/apmc.2005.1606370

Cited by 30 publications

(14 citation statements)

References 3 publications

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“…Consequently, altering these dimensions will alter the shunt reactance and, therefore, the phase response of the junction. Increasing the d p(4) to 2.2 mm and decreasing d p (6) to 1.7 mm (Fig. 5) provides port 2 with a leading phase of 2.52°, whilst the converse adjustment give port 2 a trailing phase of the same margin.…”

Section: B Unequal Phasementioning

confidence: 99%

“…Using the methods provided in [6] and [7], the design in Fig. 2 was produced with dimensions shown in Table II.…”

Section: Equal Combinationmentioning

confidence: 99%

“…A suitable combiner for the application was found in [6], where an H-plane waveguide cross junction is fitted with inductive posts to determine the coupling ratio, and inductive windows at each input ensure a matched state. These inductive windows are replaced by inductive posts in [7], reducing the complexity even further.…”

Section: Introductionmentioning

confidence: 99%

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Waveguide power combiner with adjustable amplitude and phase response

Stander

Sinha

2013

2013 23rd International Conference Radioelektronika (RADIOELEKTRONIKA)

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Abstract-Maximum gain from combining multiple high-power signals is achieved by equalising both the amplitude and phase of the combination. Achieving in-phase and equal amplitude power combining with amplifiers of unequal gain and group delay requires compensation by means of delay lines and external gain adjustment. This paper proposes an improved X-band waveguide H-plane cross-guide combiner which allows for post-production adjustment of the combining power ratio, as well as equalization of the phase responses. This adjustment capability allows for mass-production of the combiner, irrespective of the exact phase and gain characteristics of individual amplifiers. The nominally equal amplitude combining ratio is shown to be adjustable by ±0.4 dB over 400 MHz bandwidth at X-band, whilst the phase difference may be altered, independently from the amplitude response, from -2.52° to +2.52°. Good agreement is found between simulated and measured results.

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Section: B Unequal Phasementioning

confidence: 99%

“…Using the methods provided in [6] and [7], the design in Fig. 2 was produced with dimensions shown in Table II.…”

Section: Equal Combinationmentioning

confidence: 99%

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Waveguide power combiner with adjustable amplitude and phase response

Stander

Sinha

2013

2013 23rd International Conference Radioelektronika (RADIOELEKTRONIKA)

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“…It is well known that narrow-wall aperture coupler's bandwidth can be enlarged by placing multiple apertures over the common wall, but it will also make the whole coupler quite bulk. Another attractive waveguide configuration called cruciform directional coupler or H-plane crossed waveguide hybrid has been reported [9]. It is formed by two rectangular waveguides crossing each other at right angles.…”

Section: Introductionmentioning

confidence: 99%

Design of Ka-band half mode substrate integrated waveguide (HMSIW) mixer

Wang¹,

Zhu²,

You³

et al. 2009

2009 IEEE International Conference on Ultra-Wideband

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In this paper, a half mode substrate integrated waveguide (HMSIW) mixer at Ka-band is proposed. A newly developed 3-dB cruciform HMSIW coupler was employed to add LO and RF signal on schottky diodes. Size of the mixer is more compact than traditional narrow-wall aperture coupling SIW or HMSIW configuration mixer. The mixer was designed and fabricated on Roggers 5880 substrate with beam lead schottky diodes. In experimental test, conversion loss was measured in frequency range from 34 to 38 GHz under different LO power. The conversion loss of 8.2 dB was reached at 36 GHz.Keywords-coupler; single balanced mixer; schottky diode; half mode substrate integrated waveguide (HMSIW)

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“…In the present, rectangular waveguides are widely used in microwave engineering for antenna [4], filters [5,6], couplers [7], and so forth due to their advantages of low losses, high power handling, and high isolation [8]. In addition, slot array antennas based on waveguides that feature favorable antenna performance such as high directivity, low cross-polarization, and low crosstalk have been presented [9,10,15].…”

Section: Introductionmentioning

confidence: 99%

Logarithmic Slots Antennas Using Substrate Integrated Waveguide

Kachhia

Patel

Vala

et al. 2015

International Journal of Microwave Science and Technology

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This paper represents new generation of slotted antennas for satellite application where the loss can be compensated in terms of power or gain of antenna. First option is very crucial because it totally depends on size of satellite so we have proposed the high gain antenna creating number of rectangular, trapezoidal, and I shape slots in logarithm size in Substrate Integrated Waveguide (SIW) structure. The structure consists of an array of various shape slots antenna designed to operate in C and X band applications. The basic structures have been designed over a RT duroid substrate with dielectric constant of 2.2 and with a thickness of 0.508 mm. Multiple slots array and shape of slot effects have been studied and analyzed using HFSS (High Frequency Structure Simulator). The designs have been supported with its return loss, gain plot, VSWR, and radiation pattern characteristics to validate multiband operation. All the proposed antennas give gain more than 9 dB and return loss better than −10 dB. However, the proposed structures have been very sensitive to their physical dimensions.

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Cruciform Directional Couplers in H-Plane Rectangular Waveguide

Cited by 30 publications

References 3 publications

Waveguide power combiner with adjustable amplitude and phase response

Waveguide power combiner with adjustable amplitude and phase response

Design of Ka-band half mode substrate integrated waveguide (HMSIW) mixer

Logarithmic Slots Antennas Using Substrate Integrated Waveguide

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