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In this paper the analysis of a symmetrically notch loaded stacked circular disk patch antenna is carried out. It is found that the bandwidth of notch loaded disk antenna depends directly on the notch dimensions. Bandwidth of the notch loaded patch is found to be 27. 89 %. Stacking of the patch with parasitic element further improves the bandwidth to 43.56 %. Theoretical results are compared with...
In bio-medical applications and wireless communication systems, the microstrip antennas are extensively used due to their low-profile feature and ease of fabrication. With recent advances in electromagnetic computer-aided design (CAD), the design of microstrip antenna has been benefited from the utilization of accurate numerical methods. Recently the particle swarm optimization (PSO) was introduced...
A multiple slot microstrip patch antenna for wireless communication is presented. In this paper, inverted microstrip patch antenna, direct probe feed technique and the novel multiple shaped patch is integrated. This antenna offers low profile, wide bandwidth, high gain, and compact antenna element. The proposed multi-slotted microstrip patch antenna achieves a fractional bandwidth of 27.89% (1.82...
The simulated and measured results of a right triangular microstrip patch antenna (30deg - 90deg - 60deg) with and without air gap are presented in this communication. A right triangular patch antenna resonates at a single frequency but on application of small air gap of 1.5 mm between radiating patch and ground plane, it not only resonates at two frequencies but also shows marked improvement in its...
A modified rectangular patch antenna with an air gap in between the two substrate layers of patch antenna is analyzed using the IE3D simulation software to achieve compact size, lightweight and wide band operation. With variation in patch geometry and insertion of thin air gap, the bandwidth of traditional microstrip antenna which varies between 1 - 2 % is improved to more than 33.5%. Different radiation...
In this paper, we are going to discuss about the current trends in the design of Microstrip M patch antenna intended for various applications and it is a innovative nature never tried out earlier. This opens up a new avenue for different frequency ranges and new applications yet easily realizable with maximum advantages. In rectangular micro strip patch antennas [RMSA] with negative capacitance and...
A new circular polarization (CP) design for single-feed microstrip patch antennas is presented and studied. The proposed design is much simpler in construction compared to the traditional wide-band patch antenna. For the desired results, two slots are inserted into the patch antenna. Bandwidths as high as 10% are achieved with stable pattern characteristics, such as gain and cross polarization, within...
This paper presents various observations, from electromagnetic simulations and experimental results of a split ring resonator embedded patch antenna. Simulations have been done by inserting more number of SRRs in the patch antenna. There is an increase in gain, antenna efficiency, shift in resonant frequency and dual frequency of operation for the proposed patch.
The paper presents the radiation performance of an elliptical (a=15 mm, b=10.5 mm) patch antenna having circular slot (R=4.8 mm) designed on glass epoxy FR4 substrate and its performance is compared with a simple elliptical patch antenna without slot. The simulation results for this antenna are obtained with available IE3D simulation software by varying semi major axis (a) and semi minor axis (b)...
In this contribution we propose design of a Micro strip patch antenna for L-Band SAR applications. The system cost in smart antennas increase due to requirement of powerful Digital Signal Processors for adaptive and computationally intensive beam forming in every separate element chain of Smart-antenna transceiver array. The smart antennas with reasonably higher gains are needed as we have to keep...
In this paper, the effects of shorting pin on resonant frequency of the gap-coupled circular microstrip patch antennas is presented. The effects of location of shorting pin and variations of its diameter as well as the effect of variation of gap distance between adjacent edges of the feed patch and parasitic patch of gap-coupled circular microstrip patch antennas on the resonant frequency is simulated...
The analysis of V- slot loaded antenna stacked with simple patch is carried out using equivalent circuit model. It is found that stacked patch antenna exhibits enhanced bandwidth that depends on various dimensions of the V-slot. The proposed theoretical results are compared with simulated and reported experimental results which are in good agreement.
The multi-band microstrip antennas are realized by placing open circuit quarter wavelength stub on the edges of the patch or by cutting nearly half wavelength or quarter wavelength resonant slot inside or on the edges of the patch. The stub offers either capacitive or inductive impedance around the resonance frequency of the patch and realizes the dual frequencies. The slot adds another resonant mode...
This paper presents the basic terminology and concepts of patch antenna along with the description of various feeding techniques. A 2.4 GHz in-plane inset fed microstrip patch antenna has been designed. After describing various feeding techniques, the paper gives a better understanding of the design parameters of an antenna and their effect on bandwidth and efficiency. Finally, simulation is done...
Modern RFID system demands for low cost and low profile antennas. Microstrip antenna offers a potential solution meeting those requirements. In this paper a new antenna design using a inset fed that is suitable for high gain microstrip antennas is presented.
The characteristics of a small antenna using an H-shaped microstrip patch antenna is analyzed. Significant reduction of antenna size can be realized when the H-shaped patch is used instead of the conventional rectangular microstrip patch antenna. The effect of various antenna parameters like substrate height, radius of shorting post and feed point are analyzed and their effect on return loss is shown.
This paper presents the simulation results obtained with a circular patch antenna having an off centered narrow ring slit. With a particular location of ring slit near periphery of circular geometry, antenna resonates at two different frequencies which lie in the lower and upper band of Wi-Max communication adopted by IEEE 802.16. The efficiency and gain of antenna at one of these frequencies are...
In this paper a comprehensive parametric study has been carried out to understand the effects of M patch antenna and to optimize the performance of the final design. The theoretical simulations are performed using SONNET software. The results are obtained for M-shaped antennas to compare the simulation results.
A compact broadband microstrip bowtie antenna is proposed. By loading properly arranged slots in a bowtie patch antenna, broadband operation of a bowtie patch antenna are presented. The maximum impedance bandwidth achieved is 27% centered around 1.8 GHz, with good pattern characteristics.
A circular patch antenna with a narrow slit is proposed to achieve multi frequency, dual band operation. The proposed antenna radiates at four different frequencies with sufficiently high matching with probe feed system. Among these four frequencies two frequencies 2.62 GHz and 5.82 GHz lies in lower and upper frequency band respectively of Wi-Max application created by IEEE 802.16 working group....
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