Design and Performance of a Broadband Circularly Polarized Modified Semi-elliptical Microstrip Patch Antenna
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Design and Performance of a Broadband Circularly Polarized Modified Semi-elliptical Microstrip Patch Antenna Presentation Transcript:
1.Design and Performance of a Broadband Circularly Polarized Modified Semi-elliptical Microstrip Patch Antenna
2.The presentation is divided in the following sections:
Introduction
(ii) Design and Analysis of Semi Elliptical patch antenna
(iii) Design and Analysis of Modified Semi Elliptical patch antenna
(iv) Conclusions
3.Introduction
Microstrip antenna is a sandwich of two parallel conducting layers separated by a single thin dielectric substrate, the lower conductor functions as a ground plane and the upper conductor may be simple patch of any desired shape.
Usually made on PCB
Low profile, conformable to various surfaces, inexpensive, durable, but narrow-band
Modify the shape to broaden the bandwidth
4.Advantages/ Disadvantages of Microstrip Antenna:
5.Techniques for overcoming Disadvantages:
6.Recent applications of microstrip
antennas in communication electronics
Military Applications
Space Applications
Mobile communication systems
Application in modern wireless systems
Integration with electronic circuitry for different
applications
7.Design and Analysis of Semi Elliptical patch antenna
The semi-elliptical patch in its original shape has radius of semi major axis and semi minor axis equal to 23.1 mm and 13.9 mm respectively.
For designing this antenna, glass epoxy FR-4 substrate (permittivity ?r = 4.4, loss tangent tand = 0.025 and substrate height h = 1.59 mm) is applied.
The antenna is fed through SMA connector associated with 50 ohm feed line by selecting proper inset feed location on the patch geometry.
8.Variation of Return Loss with Frequency for Semi Elliptical Patch Antenna
9.The variation in input impedances of antenna with frequency is shown in figure, which also provided the excellent matching between antenna and 50 ohm impedance of feed network.
10.The minimum value of axial ratio achieved with this geometry is 8.92dB which is obtained at 3.02 GHz. The variation of axial ratio with frequency indicates that the radiations are linearly polarized as the axial ratio presented by antenna in the selected frequency range is always higher than 3db.
Download
Design and Performance of a Broadband Circularly Polarized Modified Semi-elliptical Microstrip Patch Antenna Presentation Transcript:
1.Design and Performance of a Broadband Circularly Polarized Modified Semi-elliptical Microstrip Patch Antenna
2.The presentation is divided in the following sections:
Introduction
(ii) Design and Analysis of Semi Elliptical patch antenna
(iii) Design and Analysis of Modified Semi Elliptical patch antenna
(iv) Conclusions
3.Introduction
Microstrip antenna is a sandwich of two parallel conducting layers separated by a single thin dielectric substrate, the lower conductor functions as a ground plane and the upper conductor may be simple patch of any desired shape.
Usually made on PCB
Low profile, conformable to various surfaces, inexpensive, durable, but narrow-band
Modify the shape to broaden the bandwidth
4.Advantages/ Disadvantages of Microstrip Antenna:
5.Techniques for overcoming Disadvantages:
6.Recent applications of microstrip
antennas in communication electronics
Military Applications
Space Applications
Mobile communication systems
Application in modern wireless systems
Integration with electronic circuitry for different
applications
7.Design and Analysis of Semi Elliptical patch antenna
The semi-elliptical patch in its original shape has radius of semi major axis and semi minor axis equal to 23.1 mm and 13.9 mm respectively.
For designing this antenna, glass epoxy FR-4 substrate (permittivity ?r = 4.4, loss tangent tand = 0.025 and substrate height h = 1.59 mm) is applied.
The antenna is fed through SMA connector associated with 50 ohm feed line by selecting proper inset feed location on the patch geometry.
8.Variation of Return Loss with Frequency for Semi Elliptical Patch Antenna
9.The variation in input impedances of antenna with frequency is shown in figure, which also provided the excellent matching between antenna and 50 ohm impedance of feed network.
10.The minimum value of axial ratio achieved with this geometry is 8.92dB which is obtained at 3.02 GHz. The variation of axial ratio with frequency indicates that the radiations are linearly polarized as the axial ratio presented by antenna in the selected frequency range is always higher than 3db.
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