Design of Miniaturized Quad-Band Dual-Arm Spiral Patch Antenna for Rfid, Wlan and Wimax Applications

Abstract

In this paper, a new design approach is presented for achieving a miniaturized quad-band microstrip patch antenna (MPA) suitable to be used for 915-MHz (UHF band), 2.45-and 5.8-GHz (ISM band), and 3.5-GHz (WiMAX band). The proposed antenna is called modified square spiral antenna (MSSA) which is composed of a modified dual-arm square spiral patch strip structure and a taperedground plane with coplanar wave-guide (CPW)-fed configuration to feed this antenna, all printed on the top side of an FR4 substrate. The proposed antenna is designed through intermediate systematic design steps of antennas starting from a conventional strip-fed rectangular MPA and ending by achieving MSSA. A CST Microwave Studio (CST MWS) is used to model the designed antenna, and simulation results, in terms of return loss (S 11), realized peak gain and efficiency, besides radiation patterns, are obtained. To validate the design concept, the antenna structure is fabricated, and the simulated and measured S 11 results nearly coincide with each other. The proposed antenna is characterized by miniaturized size

Wide-Band Log-Periodic Microstrip Antenna With Defected Ground Structure for C-Band Applications

“…Research in the area of microstrip antennas is advancing due to their thin planar profile, ease of surface mounting on missiles and aircrafts [1,2], ease of fabrication process [3][4][5], and ease of integrating the antenna on the same printed board with other components, especially in mobile radio communication devices [6][7][8]. The most common type of microstrip antenna is three-layered patch antenna with square [9], circular [10], rectangular [11,12], elliptical [7,8], or any other shaped patch [13] with matched feed line on the top, middle dielectric layer separating the bottom ground plane from the top layer. The antennas with microstrip patches can find applications in GPS [10,14,15], mobile devices [7,8,[11][12][13]17], WLAN [5,11,[13][14][15][16], and WiMax [5,13,15,16].…”

“…The most common type of microstrip antenna is three-layered patch antenna with square [9], circular [10], rectangular [11,12], elliptical [7,8], or any other shaped patch [13] with matched feed line on the top, middle dielectric layer separating the bottom ground plane from the top layer. The antennas with microstrip patches can find applications in GPS [10,14,15], mobile devices [7,8,[11][12][13]17], WLAN [5,11,[13][14][15][16], and WiMax [5,13,15,16]. The patch antennas are found to have low gain and narrow bandwidth [12][13][14][15].…”

“…The antennas with microstrip patches can find applications in GPS [10,14,15], mobile devices [7,8,[11][12][13]17], WLAN [5,11,[13][14][15][16], and WiMax [5,13,15,16]. The patch antennas are found to have low gain and narrow bandwidth [12][13][14][15]. The concept of log-periodic structure is often utilized to achieve the broad-band performance of antenna in microwave and THz frequency range [18][19][20][21][22].…”

Miniature Slotted Semi-Circular Dual-Band Antenna for WiMAX and WLAN Applications

“…Thus, multiband antennas should operate in the desired frequency bands allocated for these applications: 2.45 GHz (2.4-2.5 GHz), 5.8 GHz (5.725-5.875 GHz), and 3.5 GHz (3.4-3.7 GHz), respectively. In order to meet these requirements, in addition to meeting the widespread demand for antennas that are light-weight, low-cost, and easy to fabricate, microstrip antennas represent the best solution for use in most applications [1][2][3][4][5][6][7][8].…”

Printed 5g Mimo Antenna Arrays in Smartphone Handset for Lte Bands 42/43/46 Applications

“…However, although the previously reported works have provided antenna arrays in multiband below 6 GHz for 5G smartphone applications, it is still difficult for antenna engineers to design a compact 5G MIMO antenna array having multi-modes and multi-bands, which offers good MIMO performance and radiation characteristics Therefore, in this paper, multiband and dual-mode 4-, 6-, and 8-antenna array designs for 5G smartphone applications are proposed. Due to their interesting features for size miniaturization and multiband characteristics, the meander-line-and spiral-shaped geometries [20][21][22] are widely used for antenna designs. These geometries are used for each array element, which is composed of a singleturn spiral structure and meander line-shaped strip, and its low and high bands are able to cover LTE bands 42/43 (3.4-3.8 GHz) and LTE band 46 (5.150-5.925 GHz), respectively.…”