Omnidirectional multi-band stacked microstrip patch antenna with wide impedance bandwidth and suppressed cross-polarization

2016 ◽  
Vol 9 (3) ◽  
pp. 629-638 ◽  
Author(s):  
Jaishanker Prasad Keshari ◽  
Binod Kumar Kanaujia ◽  
Mukesh Kumar Khandelwal ◽  
Pritam Singh Bakariya ◽  
Ram Mohan Mehra
Keyword(s):  
Ground Plane ◽  
Impedance Bandwidth ◽  
Triple Resonance ◽  
Patch Antennas ◽  
Cross Polarization ◽  
Microstrip Patch Antennas ◽  
Microstrip Patch ◽  
Resonance Frequencies ◽  
Polarization Level ◽  
Triple Band

In this paper, triple-band stacked microstrip patch antennas (MPAs) are presented with wide impedance bandwidth and suppressed cross-polarization level. Triangular and circular shaped slots are embedded in the patch of antenna. Slot-loaded microstrip patches are fed with meandered microstrip line supported by a semi-ground plane structure. Triangular shaped slot-loaded MPA shows triple resonance at frequencies 2.2, 4.45, and 5.3 GHz having bandwidth of 45.9, 19.23, and 15.67%, respectively. Circular shaped slot-loaded MPA also shows triple resonance at frequencies 2.2, 4.42, and 5.38 GHz having bandwidth of 50.24, 33.21, and 13.43%, respectively. Using circular slot in place of triangular; bandwidth of the first and the second band is improved by 4.34 and 13.98%, respectively. Both the proposed antennas show an omnidirectional radiation pattern at all three resonance frequencies in the xz-plane with almost 0 dBi gain. Both the proposed antennas are fabricated on a FR-4 epoxy substrate and show a minimum level of cross-polarization radiations.

Wideband Microstrip Patch Antennas with Transverse Electric Modes

2020 ◽  
Vol 35 (8) ◽  
pp. 971-974
Author(s):  
Tanzeela Mitha ◽  
Maria Pour
Keyword(s):  
Transverse Electric ◽  
Ground Plane ◽  
Transverse Magnetic ◽  
Impedance Bandwidth ◽  
Patch Antennas ◽  
Microstrip Patch Antennas ◽  
Microstrip Patch ◽  
Te Mode ◽  
Artificial Magnetic Conductors ◽  
Unit Cells

A wideband microstrip patch antenna, exciting the fundamental transverse electric (TE) mode, is investigated. The excitation of the TE mode is facilitated through replacing both of the patch and ground plane of a conventional microstrip antenna with artificial magnetic conductors (AMC), consisting of unipolar compact photonic bandgap (UC-PBG) unit cells. The AMC patch and the ground plane of this antenna behave as magnetic conductors within the bandgap region of the unit cells. Similar to conventional patch antennas, it is shown that by cutting a U-shaped slot in the AMC patch, wideband characteristics are realized. The antenna shows a 40% impedance bandwidth and operates at the TE10 mode. Moreover, the width of the patch is 1.75 times smaller than its length, reducing the overall size of the antenna by about 60%, compared with the conventional U-slot PEC antenna supporting the transverse magnetic (TM) mode.

scholarly journals Performance Comparison of Swastika and Rectangular Shaped Microstrip Patch Antenna

2018 ◽  
Vol 1 (1) ◽  
pp. 11-14
Author(s):  
Suroj Burlakoti ◽  
Prakash Rai
Keyword(s):  
Radiation Pattern ◽  
Patch Antenna ◽  
Return Loss ◽  
Ground Plane ◽  
Performance Comparison ◽  
Microstrip Patch Antenna ◽  
Simulation Software ◽  
Patch Antennas ◽  
Microstrip Patch Antennas ◽  
Microstrip Patch

In this paper, Microstrip patch antennas with rectangular and swastika shape of patch are designed and its performance parameters are compared with each other. Rectangular and Swastika shaped patch are considered in this paper with common rectangular ground plane. The antenna is simulated at 2.4 GHz using HFSS simulation software. This work mainly includes modification of antenna patch to improve the antenna parameters. The parameters of antenna such as Return loss, VSWR Bandwidth and radiation pattern are compared using simulation. The performance of Swastika shaped antenna was found to be better than rectangular shaped microstrip patch antenna with improved Return Loss, VSWR, Bandwidth and Radiation Pattern.

scholarly journals Understanding and optimizing microstrip patch antenna cross polarization radiation on element level for demanding phased array antennas in weather radar applications

2015 ◽  
Vol 13 ◽  
pp. 251-268 ◽  
Author(s):  
D. Vollbracht
Keyword(s):  
Patch Antenna ◽  
Phased Array ◽  
Microstrip Patch Antenna ◽  
Main Beam ◽  
Patch Antennas ◽  
Cross Polarization ◽  
Phased Array Antennas ◽  
Microstrip Patch Antennas ◽  
Microstrip Patch ◽  
Array Antennas

Abstract. The antenna cross polarization suppression (CPS) is of significant importance for the accurate calculation of polarimetric weather radar moments. State-of-the-art reflector antennas fulfill these requirements, but phased array antennas are changing their CPS during the main beam shift, off-broadside direction. Since the cross polarization (x-pol) of the array pattern is affected by the x-pol element factor, the single antenna element should be designed for maximum CPS, not only at broadside, but also for the complete angular electronic scan (e-scan) range of the phased array antenna main beam positions. Different methods for reducing the x-pol radiation from microstrip patch antenna elements, available from literature sources, are discussed and summarized. The potential x-pol sources from probe fed microstrip patch antennas are investigated. Due to the lack of literature references, circular and square shaped X-Band radiators are compared in their x-pol performance and the microstrip patch antenna size variation was analyzed for improved x-pol pattern. Furthermore, the most promising technique for the reduction of x-pol radiation, namely "differential feeding with two RF signals 180° out of phase", is compared to single fed patch antennas and thoroughly investigated for phased array applications with simulation results from CST MICROWAVE STUDIO (CST MWS). A new explanation for the excellent port isolation of dual linear polarized and differential fed patch antennas is given graphically. The antenna radiation pattern from single fed and differential fed microstrip patch antennas are analyzed and the shapes of the x-pol patterns are discussed with the well-known cavity model. Moreover, two new visual based electromagnetic approaches for the explanation of the x-pol generation will be given: the field line approach and the surface current distribution approach provide new insight in understanding the generation of x-pol component in microstrip patch antenna radiation patterns.

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