Size miniaturization of slit‐based circular patch antenna with defected ground structure

Abstract

This letter proposes a novel compact circular patch antenna that is simulated, fabricated, and measured for different wireless applications. Traditional circular antenna is modified with dual T‐ shaped slits placed on top and bottom positions, to obtain the tri band resonant frequencies. Metallic ground plane behind the radiating patch is placed with a dual E‐shaped defected ground structure (DGS) achieving size miniaturization and bandwidth (BW) enhancement at dual bands. Antenna is well performed with and without placement of DGS in terms of obtained gain. Shape, dimensions of the finite ground plane, and frequency shift property using defect on the patch are the key factors in improving the BW and reducing the size. BWs of 3.9 and 3.6% are obtained for 1.56 and 2.47 GHz bands, respectively. The optimized dimensions of DGS are selected without degrading the antenna performance. This single layer probe feed antenna is analyzed, simulated using IE3D tool and also performed experimentally. Frequency shift technique of DGS would attain compact antenna size and is also capable of providing dual bands with better impedance matching and acceptable gain. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2410–2413, 2015

A triple‐band highly miniaturized antenna for WiMAX/WLAN applications

“…The etching of DGS on the ground plane of an antenna perturbs the current length path, as a result of which the effective capacitance and inductance changes, thereby resulting in antenna miniaturization. Several studies have reported the use of DGS to miniaturize the patch antenna . However, the antenna designed using DGS structure in this research outperforms the antenna studied in literature in terms of size, miniaturization achieved, complexity, and number of operating modes, as illustrated in Table .…”

“…Several studies have reported the use of DGS to miniaturize the patch antenna. [9][10][11][12][13][14] However, the antenna designed using DGS structure in this research outperforms the antenna studied in literature in terms of size, miniaturization achieved, complexity, and number of operating modes, as illustrated in Table 1.…”

“…Although, microstrip patch antenna being a popular choice for the aforementioned applications, difficulty arises in miniaturizing the patch antenna which includes, The resonant frequency is determined by the dominant mode of the patch activity, Difficulty in maintaining trade‐off between performance (ie, radiation characteristics and resonant mode operation) and size of the patch. Nevertheless, the literature reports several miniaturization techniques, such as, use of metamaterials (MTMs), high impedance surfaces (HIS), Magneto‐Dielectrics, reactive impedance surfaces (RIS), fractalization, loading shorting walls and pins, loading capacitors and inductors, defected ground structures (DGSs), and so forth.…”

A Miniaturized Decagonal Sierpinski Uwb Fractal Antenna

“…Antenna miniaturization can be achieved by the use of slots [4][5][6], fractals [7], metamaterials [8,9], and Defected Ground Structure (DGS) [10,11]. Ali and Biradar [12] proposed a miniaturized Volkswagen logo UWB antenna with a slot ground structure and circular Split Ring Resonator (SRR) for GPS, WLAN and WiMAX applications.…”

A miniaturized circularly polarized coaxial fed superstrate slot antenna for L‐band application

“…This is due to the fact that decrease in the patch size shifts the frequencies to higher resonance. Nevertheless, several miniaturization techniques have been reported in the literature, namely, substrate with high dielectric constant, slotted patch, defected ground structure (DGS), Metamaterials (MTM), magneto‐dielectrics, and so on. However, as compared to the aforementioned miniaturization techniques, slots are easy to implement, are less complex, occupies smaller space, cost‐effective, and have a great relevance in microwave circuit design …”