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*Broadband Cross-shaped Microstrip-fed Slot Antennas
*Broadband Cross-shaped Microstrip-fed Slot Antenna Booster
*Broadband Cross-shaped Microstrip-fed Slot Antenna Signal Booster
*Broadband Cross-shaped Microstrip-fed Slot Antenna Tuner
2005 IEEE International Conference on Industrial Technology>287 - 290
*A new design for a microstrip-fed slot antenna (MFSA) is proposed and developed for improving bandwidth, gain and reducing back radiation. In contrast with most unidirectional MFSA, a metasurface as a superstrate is employed to reduce the back-lobe radiation and enhance the gain without a metal reflector. The metasurface exhibits the near-zero permeability (0< μ <1) and negative.
*Broadband Circular Polarized Antenna with Microstrip-Fed and Parasitic Patch; Broadband Slot-Loaded Patch Antenna for 5.5 GHz; Circular Patch with two Circular Slots for 2.4 GHz; Circular Patch with Cross Slot for 1.52 GHz; Circular Polarized Ring Slot Antenna with L-shaped Feed; Circularly Polarized Annular-Ring Patch for 1.52 GHz. Abstract
In this paper, a microstrip fed rectangular slot antenna with wideband characteristics is proposed. Both the impedance and radiation characteristics of the proposed antenna are presented. It is shown that a properly offset feed can give a dual resonance nature, which can be optimized to enable wideband behavior. A new broadband planar offset antenna is described based on the T-shaped microstrip feeding structure in this paper. This antenna is optimized by the finite difference time domain (FDTD) and genetic algorithms (GA). The results show the impedance bandwidth of this antenna is from 1.864 to 6.643 GHz for S11 les -10 dB (VSWRles2), much higher than that of usual slot patch antenna, the far-filed pattern almost remain the same as that of the T-shaped microstrip feeding antenna Identifiers book ISBN : 0-7803-9484-4 DOI 10.1109/ICIT.2005.1600651 Authors User assignment Assignment remove confirmation You’re going to remove this assignment. Are you sure?Wang Hong-jian
*Nat. Microwave Remote Sensing Lab., CSSAR, BeijingZhang Sheng-weiLi Jing Keywords
UHF antennasantenna feedsbroadband antennasfinite difference time-domain analysisgenetic algorithmsmicrostrip antennasslot antennas1.864 to 6.643 GHzFDTDgenetic algorithmfourfold-T-shaped microstrip-fed slotbroadband planar offset antennafinite difference time domainimpedance bandwidthslot patch antennafar-filed patternantennaoffsets
UHF antennasantenna feedsbroadband antennasfinite difference time-domain analysisgenetic algorithmsmicrostrip antennasslot antennas1.864 to 6.643 GHzFDTDgenetic algorithmfourfold-T-shaped microstrip-fed slotbroadband planar offset antennafinite difference time domainimpedance bandwidthslot patch antennafar-filed patternantennaoffsets Additional information Publisher Share Export to bibliography
International Journal of Scientific & Engineering Research, Volume 5, Issue 6, June-2014 1469
ISSN 2229-5518
Sujeet Kumar Yadav, Kirti Vyas, Sudarshan Kumar
Abstract- Here in this paper a compact microstrip antenna having wide-slots of hexagon shape is fed by microstrip-line for wideband and multi band operations is proposed and studied. The proposed antenna resonates the 10-dB bandwidth from 0 to 6.0 GHz, and these frequency bands cover the standard IEEE 802.11b/g (2.4-2.485 GHz) and IEEE 802.11a (5.15-5.35 GHz) for WLAN applications and 2.5
GHz (2.5-2.69 GHz), 3.5 GHz (3.3-3.8 GHz) and 5 GHz (5.25-5.85 GHz) for Wi -MAX applications. Detailed design and experimental
results are shown and discussed in this paper. The antenna is simulated using IE3D electromagnetic simulator. Here in this paper the improvement in multiband and wide band behavior is investigated & discussed with VSWR<2.
Index Terms- IE3D, Microstrip line, Microstrip Slot Antenna (MSA), Multiband, Resonant Frequency.
——————————  ——————————
I. INTRODUCTION
Microstrip patch antennas are low profile, conformable to planar and non planar surfaces, simple and less expensive in manufacturing using modern printed circuit technology. The main objective in the wireless communication system is the design of wideband or even multiband low profile and small antenna. One such antenna that meets these requirements is the slot Antenna [1]. There are numerous techniques such as shorting pins, introducing slots and fractal geometries that reduce the size of the patch antenna. Micro strip slot antennas (MSAs) have the advantages of being able to produce bidirectional and unidirectional radiation patterns with larger bandwidth and very low cross polarization (typically -35dB) as compared to microstrip patch antenna [2]. In, Microstrip slot antenna, the strip and slot combination offer an additional degree of freedom in the design of microstrip antennas. A microstrip slot antenna comprises a slot cut in the ground plane of the micro strip line such that the slot is perpendicular to the strip conductor of the microstrip line .The field of the microstrip line excite the slot. For efficient excitation of the slot the strip conductor is either short circuited through the dielectric substrate to the edge of the slot, as shown in figure (a) or the strip conductor is terminated in
an open circuited stub beyond the edge of the slot, as
shown in figure (b) [3].
Figure 1 (b). Figure 1 (a)Broadband Cross-shaped Microstrip-fed Slot AntennasCentre- fed micro strip slot antenna configurations: (a) Micro strip terminated in a short circuited- stub (b) Micro strip terminated in an open circuited- stub
The regular MSA configurations, such as rectangular and
circular patches can be modified to rectangular and circular ring, respectively, to enhance the BW. The larger BW is because of a reduction in the quality factor Q of the
patch resonator, which is due to less energy stored
IJSER © 2014 http://www.ijser.org
International Journal of Scientific & Engineering Research, Volume 5, Issue 6, June-2014 1470
ISSN 2229-5518
beneath the patch and higher radiation. When a U-shaped slot is cut inside the rectangular patch, it gives a BW of approximately 40% for VSWR <2. Similar results are
obtained when a U-slot is cut inside a circular or a
28mm and the width is 38mm. The dimensions of the patch are calculated according the given formula as shown below.
triangular MSA [4]. But as the Antenna size reduces, its parameters such as gain, efficiency and polarization
deteriorates. This occurs due to the impedanceBroadband Cross-shaped Microstrip-fed Slot Antenna Booster

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