A dual-frequency patch antenna with monopolar radiation pattern

Abstract In this paper, an analysis of dual frequency resonance antenna is achieved by OM-shape microstrip patch antenna. The proposed antenna is analyzed using IE3D simulation software. The analysis of proposed structure is done by varying the dielectric constants and height of the substrate as well as gain and radiation pattern of the antenna is obtained. It observed that on varying the dielectric substrate the effect on proposed antenna is very effective.

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Dual Frequency Electronically Controlled Radiation Beam Reconfigurable slotted Antenna for Detection of a Stationary or Nonstationary Target

Defence Science Journal ◽

10.14429/dsj.70.15155 ◽

2020 ◽

Vol 70 (5) ◽

pp. 486-492

Author(s):

Manoj Kumar Garg ◽

Jasmine Saini

Keyword(s):

Radiation Pattern ◽

Patch Antenna ◽

Microstrip Patch Antenna ◽

Dual Frequency ◽

Radiation Beam ◽

Pin Diodes ◽

Stationary Target ◽

Scanning Rate ◽

Microstrip Patch ◽

Slotted Antenna

A dual-frequency and radiation pattern reconfigurable microstrip patch antenna for detecting a stationary as well as a non-stationary target is described. Six angular patches, that collectively form a circular shape, are used. All the six patches radiate one by one after a fixed interval of time and their feed controlling is done by six PIN diodes. The switching of PIN diodes is controlled by an embedded biasing network. This antenna provides radiation beam scanning characteristics. It gives the main lobe scanning at every 60o clockwise (or anticlockwise) continuously by applying a signal to patches one by one. The purpose of introducing the slot is to get the radiation pattern in the desired direction since by changing the length, width, and position of the slot, the direction of the radiation pattern can be controlled. The slotted antenna operates in a C band with two frequencies 4.21 GHz and 4.82 GHz and provides a radiation pattern, 90o apart from each other. The scanning rate of 0.6 deg/ms is obtained; however, the scanning rate can be changed with the help of ATMEGA 2560 microcontroller. This compact Microstrip patch antenna can be widely used for short-range applications i.e. ground surveillance radar, missile control, mobile battlefield surveillance for military and many other applications in a modern wireless communication system. The designed antenna along with the switching application will be able to track the stationary as well as a non-stationary target.

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Microstrip Patch Antenna

Advances in Environmental Engineering and Green Technologies - Analyzing the Physics of Radio Telescopes and Radio Astronomy ◽

10.4018/978-1-7998-2381-0.ch009 ◽

2020 ◽

pp. 178-193

Author(s):

Kim Huat Yeap

Keyword(s):

Wireless Communication ◽

Transmission Line ◽

Radiation Pattern ◽

Patch Antenna ◽

Microstrip Patch Antenna ◽

Patch Antennas ◽

Dual Frequency ◽

Transmission Line Model ◽

Communication Industry ◽

Microstrip Patch

This chapter elaborates in detail on the microstrip patch antenna, which is widely utilized in the receivers of radio telescopes, as well as in the wireless communication industry today. Several models have been developed to analyze and design the patch antennas. The three most common ones are the transmission line model, the cavity model, and the Method of Moments model. Apart from this, the important parameters used in characterizing the patch antenna are also covered, which are its gain, efficiency, directivity, radiation pattern, return loss, bandwidth, and polarization. This is followed by the introduction of the radiation regions, which are basically classified as the Fresnel region and the Fraunhofer region. Finally, the dual-frequency microstrip patch antenna is introduced. Three popular approaches adopted for the design are orthogonal-mode polarization, multi-layer patching, and reactive loading.

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Dual-Frequency Circularly Polarized Truncated Square Aperture Patch Antenna with Slant Strip and L-Shaped Slot for WLAN Applications

International Journal of Antennas and Propagation ◽

10.1155/2018/7684742 ◽

2018 ◽

Vol 2018 ◽

pp. 1-11 ◽

Cited By ~ 1

Author(s):

Sorana Niyamanon ◽

Rewat Senathong ◽

Chuwong Phongcharoenpanich

Keyword(s):

Radiation Pattern ◽

Patch Antenna ◽

Axial Ratio ◽

Experimental Results ◽

Antenna Design ◽

Impedance Bandwidth ◽

Dual Frequency ◽

Circularly Polarized ◽

Good Agreement

This research proposes a dual-frequency circularly polarized truncated square aperture patch antenna with slant stripline and L-shaped slot for WLAN applications. In the antenna design, the parameters were optimized and the WLAN-enabled dual-frequency (2.4 and 5.8 GHz) antenna was realized. Simulations were subsequently carried out for the impedance bandwidth (S11) < −10 dB, axial ratio (AR) ≤ 3 dB, optimal gain, and bidirectional radiation pattern. To validate, an antenna prototype was fabricated and the experiments were undertaken. The simulated and experimental results are in good agreement. In essence, the proposed WLAN-enabled dual-frequency circularly polarized antenna is most suited for applications in the vertically and horizontally elongated areas, including in the tunnel, train carriage, and buildings.

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