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This paper investigates a technique to design small size UWB antennas. The technique is named as Relative Size Reduction Technique (RSRT). The technique has been applied to three reference antennas, and it is observed that maximum reduction of about 53% in the antenna size is achieved without significant deterioration in antenna radiation properties. It is also shown that this technique works equally...
In this paper, a Double Negative (DNG) metamaterial is presented to enhance the performance of Microstrip Patch Antenna (MPA). The scattering parameters are used to design and validate the DNG structure. The proposed DNG is then used as a superstrate of MPA. To compare the performance a conventional MPA without DNG is also simulated. The results show that MPA with DNG has improved performance in terms...
In this paper a novel design for miniaturization of patch antenna is presented. The proposed design for the miniaturized wide band patch antenna consists of hybrid techniques of H-shaped slot on the patch and defected ground structure. Defected ground structure is formed by cutting a combination of U and L-shaped slots. Patch and the ground plane are shorted for the further size reduction. These practices...
A novel design for miniaturization of microstrip patch antenna is presented for electronic multifunctional wireless communication systems. The proposed design consists of four horizontal slots of various lengths on the patch. Combination of U and L-Shaped slots is designed on the ground plane. Patch and the ground plane are shorted through a shorting pin. These practices increase electrical length...
In this paper a novel design for miniaturization of patch antenna is presented. The proposed design for the miniaturized wide band patch antenna consists of hybrid techniques of H-shaped slot on the patch and defected ground structure. Defected ground structure is formed by cutting a combination of U and L-shaped slots. Patch and the ground plane are shorted for the further size reduction. These practices...
This article presents design of a new dual band textile antenna for WiFi application. Normally available felt fabric is utilized for the design. Operating frequencies of the antenna are 2.4GHz and 5.8GHz. Designed antenna is tested in free space and in the proximity of human body model. Because of coupling with human body, the antenna performance degrades, therefore dual band high impedance surface...
This paper describes self conceived design of new dual band wearable PIFA operating at Wifi bands (2.40 & 5.80GHz). Different radiating elements used in this indigenous design, outcomes dual mode resonance. The considered design approach has quasi omni-directional pattern that leads to significant back radiations resulting high value of Specific Absorption Rate (SAR), usually not desirable in...
A modified mushroom-like electromagnetic band gap (EBG) structure with wider band gap, and compact size is proposed. The paper presents design parametric study, perfect magnetic conductor (PMC) behavior, scalability, band gap behavior, and applications of the proposed EBG structure. The special texture on EBG patch is used to achieve wider band gap and compact size. The method of suspended transmission...
High directivity antennas are often used in communication systems to meet specific coverage requirements. This paper presents a unidirectional, high gain UWB antenna. A reference UWB antenna is considered and a metallic cavity is built around it, this arrangement along with a stacked parasitic patch shows a maximum increase of 8.5 dB in the gain of the UWB antenna. A maximum increase of 8.43 dB in...
This paper presents a parametric study of a UWB antenna loaded with parasitic patches on the front and metal sheets as reflectors on the back side. A maximum increase of 2.6dB in gain with a maximum gain of 10.4dBi was observed by increasing the number of parasitic patches but keeping their sizes fixed. Similarly by varying the size of the parasitic patches, gain increased by 5dB. Finally increasing...
A novel design for miniaturization of microstrip patch antenna with penta-band response is presented for portable and multifunctional communication systems. Our proposed design consist of U-Shaped slot on the patch with a horizontal slot below the U-Shaped slot and combination of U-Shaped and L-Shaped slots on the ground plane. We also utilized shorting pin between patch and the ground plane. By the...
High gain antennas are often used in communication systems to meet specific coverage requirements. This paper presents the gain enhancement technique for UWB antennas. Two reference UWB antennas are considered and their gain has been increased by 2.4dB using parasitic patch in stacked arrangement. The band notch UWB antenna has also been shown to show this increase in gain in the pass band. Finally,...
A novel technique for miniaturization of microstrip patch antenna is proposed for Portable and multifunctional Communication systems. Our proposed design consist of U-Shaped slot on fractal patch with first iteration and combination of L-Shape and U-Shape slots on the Ground plane. We also utilized shorting Pin between patch and ground plane. In this way we get smaller size antenna which is 89% smaller...
This paper present pent band micro strip patch antenna that resonates at GSM (Global system for mobile communication), GPS(L), GPS(L2), WLAN(wireless local area Network) and UWB .The proposed design is fed by a micro strip line and the multi band operation is achieved by using slots in the patch and a conducting strip on the bottom side of the patch. The antenna exhibits return loss RL<<−10dB...
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