Gap‐coupled designs of star shape microstrip antennas for dual band and wide band circular polarized response

2019 ◽  
Vol 29 (5) ◽  
pp. e21664 ◽  
Author(s):  
Amit A. Deshmukh ◽  
Akshay Doshi ◽  
Anuja A. Odhekar
Keyword(s):  
Wide Band ◽  
Microstrip Antennas ◽  
Dual Band

scholarly journals Dual Band Notch, Compact, Low profile, Hybrid Ultra Wideband RDRA

2020 ◽  
Vol 10 (1) ◽  
pp. 166-169
Keyword(s):  
Radiation Pattern ◽  
Dielectric Resonator ◽  
Surface Current ◽  
Wide Band ◽  
Ultra Wideband ◽  
Dual Band ◽  
Ultra Wide Band ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
Ground Structure

This paper presents a novel, compact Ultra Wide Band , Asymmetric Ring Rectangular Dielectric Resonator Antenna (ARRDRA), which is a unique combination of Thin Dielectric Resonator (DR), Fork shape patch and defective ground structure. The base of the proposed antenna is its Hybrid structure, which generates fundamental TM, TE and higher order modes that yields an impedance bandwidth of 119%. Proposed antenna provides a frequency range from 4.2 to 16.6 GHz with a stable radiation pattern and low cross polarization levels. Peak gain of 5.5 dB and average efficiency of 90% is obtained by the design. Antenna is elongated on a FR4 substrate of dimension 20 x 24x 2.168 mm3 and is particularly suitable for C band INSAT, Radio Altimeter, WLAN, Wi-Fi for high frequencies. Ease in fabrication due to simplicity, compactness, stable radiation pattern throughout the entire bandwidth are the key features of the presented design. Inclusion of Defective ground structure and asymmetric ring not only increases the bandwidth but also stabilize the gain and efficiency due to less surface current. Presented design launch an Ultra Wide Band antenna with sufficient band rejection at 4.48-5.34 and 5.64-8.33 GHz with stable radiation pattern and high gain.

Design Considerations Pertaining to the Application of Complementary Split Ring Resonators in Microstrip Antennas

2019 ◽  
pp. 25-56
Author(s):  
Sivaranjan Goswami ◽  
Kumaresh Sarmah ◽  
Angana Sarma ◽  
Kandarpa Kumar Sarma ◽  
Sunandan Baruah
Keyword(s):  
Effective Permittivity ◽  
Microstrip Antennas ◽  
Negative Permittivity ◽  
Ring Resonators ◽  
Dual Band ◽  
Split Ring ◽  
Complementary Split Ring Resonator ◽  
Dual Band Antennas ◽  
Notch Filtering ◽  
Filtering Element

Metamaterial-based design of microstrip antennas and other microwave structures have gained enormous popularity worldwide among researchers. The complementary split ring resonator (CSRR) is one of the most commonly used metamaterial structures in this direction. The CSRR structure yields a negative value of its effective permittivity at a narrow band near its resonant frequency. CSRR structure was initially proposed as a notch filtering element in microstrip transmission lines because of the negative permittivity. Later, the CSRR structure found its use in antennas and other microwave applications. The CSRR structure is reported to enhance the performance of a microstrip antenna in terms of its gain and bandwidth. In addition, CSRR structure is also used in the design of dual band antennas and antennas with integrated filters. This chapter deals with the practical design aspects relative to these applications of CSRR structures.

Electromagnetic Optimization using Genetic Algorithms

2010 ◽  
pp. 93-105
Author(s):  
P. Mukherjee ◽  
E. L. Hines
Keyword(s):  
Genetic Algorithms ◽  
Microstrip Antenna ◽  
Microstrip Antennas ◽  
Single Band ◽  
Dual Band ◽  
Matching Network ◽  
Power Handling

This chapter focuses on the application of Genetic Algorithms (GAs) techniques in overcoming the limitations of microstrip antennas in terms of several key parameters such as bandwidth, power-handling capacity etc. In this chapter the effectiveness of GAs is discussed in relation to Electromagnetic optimization. A matching network has been designed for single band and dual band matching of microstrip antenna using GA.

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