scholarly journals Improvement of a Circular Microstrip Antenna Excited by Four Feeds and Suspended with Artificial Magnetic Conductors

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Sanchai Eardprab ◽  
Chuwong Phongcharoenpanich ◽  
Danai Torrungrueng
Keyword(s):  
Microstrip Antenna ◽  
Axial Ratio ◽  
Microstrip Antennas ◽  
Patch Antennas ◽  
Microstrip Patch Antennas ◽  
Microstrip Patch ◽  
Antenna Performance ◽  
Artificial Magnetic Conductors ◽  
Circular Microstrip Antenna ◽  
Microstrip Structure

The proposed antenna is a circular microstrip structure excited by four feeds and suspended with artificial magnetic conductors (AMCs). The multifeed circular microstrip antennas can generate a high circularly polarized performance by using a different feed arrangement. AMC structures with a square, circular, or octagonal patch on a unit cell are designed and applied to circular microstrip patch antennas for the enhancement of antenna performance. It is found that simulated results of the proposed antenna are well suited. The properties of wide beamwidth with good axial ratio can be achieved when applying the proposed AMC structures to circular microstrip antennas. The antenna prototype was fabricated to validate simulated results.

scholarly journals Improving the Performance of a Microstrip Antenna by Adding a Slot into Different Patch Designs

2021 ◽  
Vol 11 (4) ◽  
pp. 7469-7476
Author(s):  
M. J. Hakeem ◽  
M. M. Nahas
Keyword(s):  
Microstrip Antenna ◽  
Low Cost ◽  
Ground Plane ◽  
Front Surface ◽  
Dielectric Substrate ◽  
Patch Antennas ◽  
High Frequency Structure Simulator ◽  
Microstrip Patch Antennas ◽  
Microstrip Patch ◽  
Antenna Performance

Microstrip patch antennas are attractive for communication applications due to their small size, low cost, and easy fabrication. Regardless of the diverse usage of these antennas, their bandwidth and efficiency are still limited and need to be improved. Therefore, this paper aims to enhance the bandwidth and efficiency of a microstrip antenna by inserting a slot into various patch designs. Flame Retardant (FR4) material is used in the dielectric substrate and the antenna is fed by a microstrip line. Virtually, the antenna performance is attempted to be optimized through empirical investigations of feedline lengths, slot sizes and positions, and ground plane dimensions and locations. To achieve the results, the High Frequency Structure Simulator (HFSS) is used, and the paper concludes by showing that the antenna performance is enhanced by the slot, and the return loss is significantly reduced when the ground plane is moved to the front surface of the antenna.

scholarly journals Performances of Symmetric and Asymmetric T-slot Microstrip Antennas for Bluetooth Communication

2017 ◽  
Vol 5 (2) ◽  
Author(s):  
Saurabh Chandra ◽  
Pranaw Kumar ◽  
Jibendu Sekhar Roy
Keyword(s):  
Microstrip Antenna ◽  
Data Transfer ◽  
Microstrip Antennas ◽  
Portable Devices ◽  
Patch Antennas ◽  
High Frequency Structure Simulator ◽  
Microstrip Patch Antennas ◽  
Antenna Performance ◽  
Parametric Studies ◽  
Bluetooth Communication

Bluetooth is a short distance unlicensed wireless communication technology operating at 2.4 GHz band and primarily used for data transfer between portable devices. In this paper, small size microstrip patch antennas, loaded by symmetric and asymmetric T-shaped slots are designed and a comparative study of their performance at Bluetooth frequency band is presented. High frequency structure simulator (HFSS) software is used for antenna simulation. Improved bandwidth, uniform radiation pattern and good gain of the antenna are achieved using asymmetric T-slot microstrip antenna compared to symmetric T-slot microstrip antenna. The dimension of asymmetric T-slot microstrip antenna is 75% less than the symmetric T-slot microstrip antenna. Performance of the antennas, through parametric studies, related to the dimensions of the symmetric and asymmetric T-slots, is also presented.  

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.

Multidirectional Circular Microstrip Patch Antenna Strain Sensor

2011 ◽  
Author(s):  
Ali Daliri ◽  
Chun H. Wang ◽  
Sabu John ◽  
Amir Galehdar ◽  
Wayne S. T. Rowe ◽  
...  
Keyword(s):  
Patch Antenna ◽  
Strain Sensor ◽  
Microstrip Patch Antenna ◽  
Strain Sensors ◽  
Current Sensor ◽  
Patch Antennas ◽  
Microstrip Patch Antennas ◽  
Microstrip Patch ◽  
Antenna Performance ◽  
Software Packages

In this paper, a new design for microstrip patch antenna strain sensors is proposed. The new antenna sensor works based on the meandered microstrip patch antennas. It is threefold more sensitive than previously proposed circular microstrip patch antenna strain sensors. Also, the overall physical dimension of the new antenna sensor is reduced by the factor of five. The current sensor is able to detect strain in all directions. In order to design the antenna sensor, two available commercial FEM software packages ANSYS™ and HFSS™ are used. Both experimental and FEM results corroborate the multidirectional feature of the new antenna sensor. Also, the effect of the hole size in the structure (for coaxial connection to the antenna) on the antenna performance has been studied. Based on the results obtained, the antenna sensor can be recommended for use in structural health monitoring for strain-based damage detection in aerospace structures.

Metamaterial-Based Wearable Microstrip Patch Antennas

2018 ◽  
pp. 444-488
Author(s):  
J. G. Joshi ◽  
Shyam S. Pattnaik
Keyword(s):  
Loading Condition ◽  
Size Reduction ◽  
Patch Antennas ◽  
Microstrip Patch Antennas ◽  
Microstrip Patch ◽  
Wearable Antennas ◽  
Antenna Performance ◽  
Bending Effect ◽  
Resonant Modes ◽  
Sub Wavelength

This chapter presents metamaterial-based wearable, that is, textile-based, antennas for Wi-Fi, WLAN, ISM, BAN and public safety band applications, which have been designed, fabricated, and tested. Textile substrates like polyester and polypropylene are used to design and fabricate these antennas. The metamaterial inclusions are directly used to load the different microstrip patch antennas on the same substrate, which significantly enhances the gain and bandwidth with considerable size reduction. The microstrip patch antenna generates sub-wavelength resonances under loading condition due to the modifications of its resonant modes. The DNG and SNG metamaterials are used to load the microstrip patch antennas for size reduction by generating the sub-wavelength resonances. The simulated and measured results are found to be in good agreement for all the presented wearable antennas. The bending effect on antenna performance due to human body movements is also presented in this chapter.

scholarly journals Review of Reconfigurable Microstrip Patch antenna for Wireless Application

2019 ◽  
Vol 7 (6) ◽  
pp. 25-28
Author(s):  
Shraddha Pandey ◽  
Pankaj Vyas
Keyword(s):  
Microstrip Antenna ◽  
Research Area ◽  
Antenna System ◽  
Microstrip Patch Antenna ◽  
Dual Band ◽  
Pin Diode ◽  
Patch Antennas ◽  
Microstrip Patch Antennas ◽  
Microstrip Patch ◽  
Wireless Application

In recent time, world have seen a rapid growth in wireless communication. Development in antenna from single band to dual band and multi band had made the antenna system more compact. A frequency reconfigurable microstrip antenna using a PIN diode for multiband operation is using many application and hot research area. In this paper, reconfigurable microstrip patch antennas and their types like frequency, polarization, radiation pattern and gain are described.

scholarly journals Design And Development of Inset Feed Microstrip Patch Antennas using Various Substrates

2019 ◽  
Vol 8 (9) ◽  
pp. 163-167
Keyword(s):  
Microstrip Antenna ◽  
Return Loss ◽  
Low Cost ◽  
Substrate Material ◽  
Patch Antennas ◽  
Microstrip Patch Antennas ◽  
Microstrip Patch ◽  
X Band ◽  
Materials Used ◽  
Rectangular Microstrip Antenna

Selecting an appropriate substrate material for the design of microstrip patch antenna for various applications is a very important step in antenna design. This paper presents a work of various substrates materials used for the design of low cost inset feed rectangular microstrip antenna for WLAN, WiMax, LTE, C-band and X-band applications. The substrates used are FR-4 epoxy, foam, polyethylene terephthalate (PET) and polydimethylsiloxane (PDMS). The antennas were designed, optimized and simulated using HFSS 15.0. Return loss, voltage standing wave ratio and gain analysis is carried out for these antennas. The measurement of reflection coefficient of the fabricated antennas is done using Agilent PNA-L series vector network analyzer. The simulated and measured results are well in agreement. The analysis show that antenna with foam substrate offers the lowest return loss of - 41.28 dB. Larger bandwidth and gain of 4.38 dB is observed with PET substrate.

Metamaterial-Based Wearable Microstrip Patch Antennas

2014 ◽  
pp. 518-556 ◽  
Author(s):  
J. G. Joshi ◽  
Shyam S. Pattnaik
Keyword(s):  
Loading Condition ◽  
Size Reduction ◽  
Patch Antennas ◽  
Microstrip Patch Antennas ◽  
Microstrip Patch ◽  
Wearable Antennas ◽  
Antenna Performance ◽  
Bending Effect ◽  
Resonant Modes ◽  
Sub Wavelength

This chapter presents metamaterial-based wearable, that is, textile-based, antennas for Wi-Fi, WLAN, ISM, BAN and public safety band applications, which have been designed, fabricated, and tested. Textile substrates like polyester and polypropylene are used to design and fabricate these antennas. The metamaterial inclusions are directly used to load the different microstrip patch antennas on the same substrate, which significantly enhances the gain and bandwidth with considerable size reduction. The microstrip patch antenna generates sub-wavelength resonances under loading condition due to the modifications of its resonant modes. The DNG and SNG metamaterials are used to load the microstrip patch antennas for size reduction by generating the sub-wavelength resonances. The simulated and measured results are found to be in good agreement for all the presented wearable antennas. The bending effect on antenna performance due to human body movements is also presented in this chapter.

Design and Comparative Analysis of Rectangular Slot Microstrip Patch Antennas for X-band Applications

2018 ◽  
Vol 8 (5) ◽  
pp. 48
Author(s):  
Pushpinder Singh ◽  
Gaurav Monga
Keyword(s):  
Microstrip Antenna ◽  
Ground Plane ◽  
Surface Current ◽  
Microstrip Antennas ◽  
Patch Antennas ◽  
Polar Plot ◽  
Rectangular Slot ◽  
Compact Antenna ◽  
Microstrip Patch ◽  
X Band

Microstrip patch antenna is a compact antenna which suffers the limitations of poor gain and reduction in radiation pattern. To reduce the resonance frequency of microstrip antenna increases the length of surface current with help of cutting slots in the patch. In this paper, a comparison of four Microstrip antennas with unequal length of rectangular slots is proposed. The microstrip antennas having rectangular shaped ground plane and FR4-epoxy substrate with relative permittivity 4.4, relative permeability 1 and dielectric loss tangent 0.02 with an overall size of 100×100×5 mm3. The performance of antennas is compared with slots in the patch and the effects of rectangular slots using operating frequency of 8 to 12 GHz are presented. The design simulate and analyze on FEM based HFSSv11 and this helps to compute VSWR, return loss,  gain, radiation efficiency and 3D polar plot of the proposed microstrip antenna. The proposed configuration gives broadside gain of more than 8 dBi and VSWR (>2) over entire range in simulated results.

scholarly journals Array Mutual Coupling Reduction Using L-Loading E-Shaped Electromagnetic Band Gap Structures

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Tao Jiang ◽  
Tianqi Jiao ◽  
Yingsong Li
Keyword(s):  
Band Gap ◽  
Antenna Array ◽  
Microstrip Antenna ◽  
Mutual Coupling ◽  
Patch Antennas ◽  
Electromagnetic Band Gap ◽  
Microstrip Patch Antennas ◽  
Microstrip Patch ◽  
Microstrip Antenna Array ◽  
Mutual Coupling Reduction

A mutual coupling reduction method between microstrip antenna array elements is proposed by using periodic L-loading E-shaped electromagnetic band gap structures. Two identical microstrip patch antennas at 2.55 GHz are settled together and used to analyze the performance of the designed two-element antenna array. The two antenna elements are settled with a distance of about0.26λ. To reduce the mutual coupling, the L-loading E-shaped electromagnetic band gap structures are used between these antenna elements. The simulated and measured results show that the isolation of the antenna array reaches 38 dB, which has a mutual coupling reduction of 26 dB in comparison with the antenna array without the decoupling structures.

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