Aperture-coupled patch antennas with wide-bandwidth and dual-polarization capabilities

Tsao, C. H.; Hwang, Y.; Kilburg, F.; Dietrich, Florian

doi:10.1109/aps.1988.94241

Cited by 106 publications

(29 citation statements)

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“…These disadvantages make microstrip antennas unsuitable for SAR systems. Hence, several bandwidth enhancement techniques have been reported in literature including utilization of: (1) parasitic patches [8]; (2) near resonant aperture with thick antenna substrate [9]; stacked patches where a parasitic element is placed above a lower patch [10]; and composite right/lefthanded transmission-lines (CRLH-TLs) [11]- [15]. Bandwidth and radiation efficiency enhancement in the case of using CRLH-TL structures can be achieved by simply using a thicker substrate with lower dielectric constant [9].…”

Section: Introductionmentioning

confidence: 99%

Wideband planar array antenna based on SCRLH-TL for airborne synthetic aperture radar application

Alibakhshikenari

Virdee

Limiti

2018

Journal of Electromagnetic Waves and Applications

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Section: Introductionmentioning

confidence: 99%

Wideband planar array antenna based on SCRLH-TL for airborne synthetic aperture radar application

Alibakhshikenari

Virdee

Limiti

2018

Journal of Electromagnetic Waves and Applications

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“…microstrip patches [2]. However, it was soon discovered that it was the number of antennas rather than size that was the main issue for the operators and therefore both dual polarized (for diversity) [3] and multi-band antennas [4] were soon developed.…”

Section: Introductionmentioning

confidence: 99%

The Evolution of Base Station Antennas for Mobile Communications

Beckman

Lindmark

2007

2007 International Conference on Electromagnetics in Advanced Applications

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− This paper gives a general overview of the design of base station antennas for mobile communications. It explains underlying theoretical and practical implementation aspects in mobile communication networks of today and the future. In the first part the fundamental parameters of a base station antenna are discussed in the context of radio network design. In particular we discuss parameters such as gain, radiation patterns, frequency bands and power handling and put them in the context of cell planning, propagation and capacity. In the final parts of the paper we give an overview of the underlying theory of diversity and MIMO systems.

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“…Each parameter can be used to adjust a particular performance benchmark without substantially affecting the others. For example, dual polarization can be obtained by using two orthogonal feeds and two orthogonal slots [6], [7], [8], [9] without being concerned about real estate (especially in phased arrays) and spurious radiation from feed. Circular polarization can be achieved by a single diagonal slot and a slightly non-square patch [10] or by using a crossed slot with a single microstrip feedline through the diagonal of the cross and a slightly non-square patch [11].…”

Section: Aperture-coupled Microstrip Antennasmentioning

confidence: 99%

A Generalized 2-D Multiport Model for Planar Circuits With Slots in Ground Plane

Khajehnasiri

Safavi‐Naeini

2007

IEEE Trans. Antennas Propagat.

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With increasing complexity of microwave integrated circuits and tendency towards building integrated modules, real estate in printed circuit boards becomes more at premium. On the other hand, building MIC's on a single semiconductor substrate such as GaAs has other drawbacks as substrate requirements for different components are sometimes contradictory. This has motivated researchers to consider multi-layer and stacked designs. Multi-layer planar circuits offer advantages that cannot be equalled by traditional single layer designs. In this respect, a new class of planar structures, based upon a multi-layered stack of dual-mode stripline or microstrip patches is becoming increasingly popular. In the new stacked design, coupling between planar circuits separated by a ground plane is accomplished through coupling apertures in the common ground plane.This thesis is about developing an new approximate multiport network model for fast analysis of multi-layered planar structures with ground plane slots. To extend applicability of multiport network model (MNM) to the class of planar structures containing ground plane slots, a generalized network formulation for aperture problems is combined with traditional MNM to account for the presence of the slot. To this end, the slot is replaced by an unknown equivalent surface magnetic current. Slot ports are defined in terms of electric and magnetic fields over the slot in accordance with the generalized network formulation for aperture problems. While traditional MNM for planar circuits is based on generalized impedance matrices, we adopt a hybrid matrix approach for multi-layer structures. The hybrid matrix consists of four sub-matrices that relate terminal voltages and currents of edge and slot ports. The same generalized impedance matrix in the absence of the slot can be used to relate terminal voltages and currents of edge ports when the slot ports are short-circuited. Open circuit voltage at edge ports due to terminal voltages at slot ports and terminal currents at slot ports due to input currents at edge ports are represented by two transfer matrices. Both these transfer matrices can be calculated from 2D analysis which only considers T M z modes.Interaction among slot ports, represented by a generalized admittance matrix, however, requires considering both T M z and T E z modes. This generalized admittance matrix is obtained from tangential component of the magnetic field over the slot due to the equivalent surface magnetic current and relates terminal voltages and currents of slot ports. Full modal expansion consisting of both T M z and T E z modes is used to compute the generalized admittance matrix of a slot in a regularly shaped planar cavity. For irregularly shaped patches, modal expansion is not available. Instead, a new contour integral equation for magnetic field, derived for the iii first time in this thesis, is combined with complex images method for calculation of generalized admittance matrix of a slot radiating in a planar cavity of arbitrary shape.O...

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Aperture-coupled patch antennas with wide-bandwidth and dual-polarization capabilities

Cited by 106 publications

References 1 publication

Wideband planar array antenna based on SCRLH-TL for airborne synthetic aperture radar application

Wideband planar array antenna based on SCRLH-TL for airborne synthetic aperture radar application

The Evolution of Base Station Antennas for Mobile Communications

A Generalized 2-D Multiport Model for Planar Circuits With Slots in Ground Plane

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