Waveguide to microstrip line transition and power divider

Wu, Dakui; Seo, Kazuyuki

doi:10.1049/el:20073694

Cited by 13 publications

(5 citation statements)

References 1 publication

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“…Some researchers have developed power dividers using the planar feeds, such as microstrip and coplanar waveguide (CPW) feeds. For example, probes are used to excite the rectangular waveguide cavities and then equally divide the power from a microstrip feed [6–8] and a CPW feed [9]. In addition, apertures are used on the broad walls of the rectangular waveguides to couple the power from a microstrip line [10].…”

Section: Introductionmentioning

confidence: 99%

A broadband coplanar waveguide to rectangular waveguide power divider using a slot

Fang

Wang

2012

Int J RF and Microwave Comp Aid Eng

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In this article, a broadband coplanar waveguide (CPW) to rectangular waveguide power divider using the dipole slot is proposed. The power divider consists of an input CPW port and two output rectangular waveguide ports. The CPW to rectangular waveguide power divider using the dipole slot has a return loss larger than 15 dB and an insertion loss equal to 3.08–3.27 dB in the whole X‐band (8.2–12.4 GHz). Furthermore, to broaden the bandwidth, the dipole slot is replaced by the bow‐tie slot. The CPW to rectangular waveguide power divider using the bow‐tie slot yields a return loss larger than 16 dB and an insertion loss equal to 3.05–3.29 dB from 8 to 13 GHz, which exceeds the X‐band. To verify our design, power dividers that use the dipole slot or the bow‐tie slot are fabricated and measured. The measurement results of both power dividers are in good agreement with the simulation results. © 2012 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2013.

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Section: Introductionmentioning

confidence: 99%

A broadband coplanar waveguide to rectangular waveguide power divider using a slot

Fang

Wang

2012

Int J RF and Microwave Comp Aid Eng

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“…When a center-fed microstrip array antenna is fed with a previously-developed transition [12], element spacing around the feeding circuit of the transition from the waveguide to the two microstrip lines is larger than one wavelength as shown in Figs. 1(a), (b).…”

Section: Introductionmentioning

confidence: 99%

Transition from Waveguide to Two Microstrip Lines with Slot Radiators in the Millimeter-Wave Band

Seo¹,

Sakakibara

Kikuma

2011

IEICE Trans. Commun.

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Many kinds of microstrip array antennas have been developed in the millimeter-wave band. In order to avoid feeding loss and the decrease of antenna gain by beam shift due to frequency changes, center-fed array antennas are advantageous. In this case, the element spacing around the feeding circuit of the transition from the waveguide to two microstrip lines is larger than one wavelength. Therefore, the sidelobe level grows significantly. In order to suppress the sidelobe level, we propose transitions with slot radiators. Moreover, any polarization angles can be achieved by changing the slot angle. A wide variety from 1.5% to 70% of slot radiator coupling powers can be achieved. To investigate the performance of the proposed transition, 10, 22 and 30-element center-fed microstrip combline antennas with the proposed transition were developed at 76.5 GHz, and measured performance was evaluated in the millimeter-wave band.

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“…However, this design suffers from ohmic and dielectric losses of the connecting microstrip line at higher frequencies [7,8]. Therefore, a low-loss, low-radiation feed network is applied to replace the coplanar one to achieve the high efficiency microstrip antenna array [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Low cost, high efficiency, low side-lobe array of waveguide-fed microstrip antennas

Zhang

2010

Microw. Opt. Technol. Lett.

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inductor the inductive stub is very small, the measured matching of the inductive stub is much better than that of the shunt lump inductor. This is probably attributed to fact that it is not easy to simulate a lump component very accurately whereas an inductive stub can be simulated very accurately. The measured insertion loss of the inductive stub is À0.9 dB across all the operating bands, which is much better than the measured insertion loss of the other two cases. Furthermore, it is obvious that the feeding structure with the inductive stub has better ESD protection than that with the lump inductor. Apart from the electrical properties discussed above, the replacement of the lump inductor by the inductive stub is also cost effective, because a lump inductor with a high-quality factor is generally not cheap. CONCLUSIONSAn inductive stub of matching the feeding line and feeding pad of a penta-band monopole antenna is proposed to replace a lump inductor which has been traditionally used in monopole .pb6 design of mobile devices. In comparison with a lump inductor, the main advantage of the proposed inductive stub can be classified as:• Much improved return loss and insertion loss.• Perfect ESD protection.• Cost effective, especially for large-scale productions.ABSTRACT: A low-cost, low side-lobe Ku-band array of microstrip antennas, which is fed by waveguide, is presented in this article. The 72 corner-fed square patches of the array are arranged in a 6-by-12 configuration. A novel waveguide to microstrip line transition with power divider is employed as a center fed for the array to reduce the loss of the microstrip feed line. The measured gain is 24.1 dB. The side-lobe is below À20 dB, and the return loss at resonant frequency 12.5 GHz is less than À25 dB.

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Waveguide to microstrip line transition and power divider

Cited by 13 publications

References 1 publication

A broadband coplanar waveguide to rectangular waveguide power divider using a slot

A broadband coplanar waveguide to rectangular waveguide power divider using a slot

Transition from Waveguide to Two Microstrip Lines with Slot Radiators in the Millimeter-Wave Band

Low cost, high efficiency, low side-lobe array of waveguide-fed microstrip antennas

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