Analysis of microstrip lines coupled through an arbitrarily shaped aperture in a thick common ground plane

Tran, Allen; Itoh, T.

doi:10.1109/mwsym.1993.276749

Cited by 11 publications

(2 citation statements)

References 7 publications

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“…There are two main techniques for a transition between microstrip lines in multilayer technology. One employs an electrical contact and the other use electromagnetic coupling [28][29][30][31]. One type uses vias to connect the top layer microstrip ground planes with the lower microstrip ground plane and the other does not.…”

Section: Microstrip Slot-coupled Transitionmentioning

confidence: 99%

“…The transitions using via holes are compact and broadband, but the vias can cause parasitic inductance and are difficult to be fabricated [29]. In other hand, the transitions by electromagnetic coupling require no wire bonds or via holes [29][30][31]. In this perspective, printed slots have been preferred to be versatile for vertical transitions.…”

Section: Microstrip Slot-coupled Transitionmentioning

confidence: 99%

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A New Ultra-Wideband Beamforming for Wireless Communications in Underground Mines

Nedil¹,

Denidni²,

Djaiz³

et al. 2008

PIER M

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Abstract-In this paper, a novel ultra-wideband switched-beam antenna system based on 4×4 two-layer Butler matrix is presented and implemented to be used in hostile environment, such as underground mines. This matrix is based on the combination of a broadband twolayer slot-coupled directional coupler and a multilayer slot-coupled microstrip transition. With this configuration, the proposed matrix was designed without using any crossovers as used in conventional Butler matrices. Moreover, this new structure is compact and offers an ultra-wide bandwidth of 6 GHz. To examine the performance of the proposed matrix, experimental prototypes of the multilayer microstrip transition and the Butler matrix were fabricated and measured. Furthermore, a three 4-antenna arrays were also designed, fabricated and then connected to the matrix to form a beamforming antenna system at 3, 5.8 and 6 GHz. As a result, four orthogonal beams are produced in the band 3-9 GHz. This matrix is suitable for ultrawideband communication systems in confined areas.

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Section: Microstrip Slot-coupled Transitionmentioning

confidence: 99%

Section: Microstrip Slot-coupled Transitionmentioning

confidence: 99%