Wideband substrate integrated waveguide power splitter with high isolation

Sarhadi, K.; Shahabadi, Mahmoud

doi:10.1049/iet-map.2009.0413

Cited by 29 publications

(10 citation statements)

References 8 publications

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“…An SIW matching load, with the advantage of high integration as shown in Fig. 5c is proposed to absorb the excess power in each feeding SIW in the lens layer based on the idea in [24]. It consists of a transverse slot, four chip resistors (R1-R4) and a short-circuit wall.…”

Section: Siw Coupler With Double-stepped Slotmentioning

confidence: 99%

Compact Rotman lens‐fed slot array antenna with low sidelobes

Liu

Yang

Zeng³

et al. 2018

IET Microwaves, Antennas & Propagation

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A slot array in substrate‐integrated waveguide (SIW) technology fed by a microstrip Rotman lens is proposed. This compact multibeam antenna is designed in two layers using a novel transition based on double‐stepped coupling slots on the broad wall of SIWs. Compared with a rectangular transverse coupling slot, this transition is broadband and its coupling power can be controlled for low‐sidelobe applications. The radiating part is a 10 × 10 slot array and the beam‐forming network can generate seven beams with good coverage from −30° to 30° in the azimuthal plane. To validate the proposed concept, an antenna prototype is implemented at 10 GHz. The frequency response and measured radiation patterns are in good agreement with simulated results provided by full wave simulation software. Experimental results show that the sidelobe level is lower than −21 dB for the central beam in both H and E planes and better than −18 dB for the edge beams.

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Section: Siw Coupler With Double-stepped Slotmentioning

confidence: 99%

Compact Rotman lens‐fed slot array antenna with low sidelobes

Liu

Yang

Zeng³

et al. 2018

IET Microwaves, Antennas & Propagation

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“…To improve the isolation, additional resistance is used in a Wilkinson divider [19] or is placed at the E-plane arm of a modified magic-T [20]. For higher isolation, complicated multiport configurations where the extra ports are terminated with resistance or absorbing material are proposed [3,21].…”

Section: Introductionmentioning

confidence: 99%

SIW planar balun with enlarged bandwidth

Chan

Gong

et al. 2019

IET Microwaves, Antennas & Propagation

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An X‐band substrate integrated waveguide (SIW) balun, based on a Y‐type divider with enlarged bandwidth, is presented in this study. In most SIW Y‐type dividers, the undesired TE30 mode either leads to the deterioration of the in‐band reflection or constrains the bandwidth by a transmission zero. The cause of the transmission zero is analysed and the modes coupling, rather than the step impedance matching, is utilised to reduce its impact. In the traditional Y‐type divider, the frequency band is split by this transmission zero, while in the proposed wideband configuration, the co‐existences of the TE10 and TE30 modes are employed to combine the two non‐contiguous bands. A broadband balun is designed and fabricated, with the improved Y‐type wideband divider serving for the power‐dividing part. The dividing ports are connected to the reversely placed transitions, achieving inherent out‐of‐phase performance and good amplitude property. The measurement of the balun suggests a 43.94% bandwidth from 8.23 to 12.89 GHz, with 15 dB return loss. The measured amplitude and phase imbalance between two output ports are below 0.7 dB and ±3°, respectively. The performance of the fabricated balun is in agreement with the simulation, and it is promising for wideband applications.

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“…More recently, the design of WPDs have become more compact [11][12][13][14][15][16][17]. For example, in [11] the WPD is proposed using two section asymmetrical T-structures to achieve a significant size reduction.…”

Section: Introduction 4mentioning

confidence: 99%

Miniature In-Phase Wilkinson Power Divider with Pair of Parallel Transmission-Lines for Application in Wireless Microwave Systems

Khajeh-Khalili

Honarvar

Virdee

2018

IETE Journal of Research

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A novel miniature Wilkinson power divider (WPD) design is presented. This is achieved by substituting the quarter-wavelength transmission-lines constituting the WPD with an equivalent pair of parallel transmission-lines (PPTLs) that effectively reduce the circuit size of the WPD by 43% compared with a conventional design whose ground-plane is defected. Particle swarm optimization (PSO) technique is used to achieve size reduction. Meandering the transmission-lines further reduce the WPD size by 22%. The proposed WPD has overall dimensions of 9.38 × 11.51 mm 2 or 0.11 λg × 0.14 λg, which is compatible with the requirements imposed by portable personal wireless systems. Coupling between the parallel transmission-lines is shown to extend the operational bandwidth of the power divider to 3.2 GHz (0.8-4 GHz) for a return-loss better than 10 dB. Index Terms-Wilkinson power divider (WPD), pair of parallel transmission-lines (PPTLs) miniaturization, particle swarm optimization (PSO), defected ground structure (DGS).

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Wideband substrate integrated waveguide power splitter with high isolation

Cited by 29 publications

References 8 publications

Compact Rotman lens‐fed slot array antenna with low sidelobes

Compact Rotman lens‐fed slot array antenna with low sidelobes

SIW planar balun with enlarged bandwidth

Miniature In-Phase Wilkinson Power Divider with Pair of Parallel Transmission-Lines for Application in Wireless Microwave Systems

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