Design of a Planar MIMO Antenna for LTE-Advanced

Abstract

This paper presents the design of a wideband microstrip patch antenna for LTE-A. The bandwidth of the conventional patch is enlarged by using etched slots at the antenna patch. The designed antenna has been fabricated by using thin film and photolithographic technique and has been measured by using the Vector Network Analyzer. The simulated and measured results were found to have good match with each other. Then, by using the designed single element antenna, a four-element MIMO antenna system has been built employing orthogonal polarization diversity. Isolation between the microstrip elements is increased by placing metal structure between antenna elements. For more isolation between antenna elements, Slotted Ground Plane SGP is utilized. It is found, by using commercial software CST Microwave Studio and measurement, that the designed planar MIMO antenna system has sufficiently high return loss and low mutual coupling at the required bandwidth of 70 MHz. It is found also that the developed antenna system meets the requirements for LTE-Advanced (2500-2570 MHz) band "CA-B7" as of today"s standard based on 36.101 Table 5.5-1 (March 2012) .

Design of Miniaturized and High Isolation Metamaterial-Based Mimo Antenna for Mobile Terminals

“…For validation purpose, a comparison between the proposed antenna and some recent works reported in literatures is concluded in Table 4. Comparing the proposed structure with [18], the proposed structure is much compact by more than 40 % and better in the isolation between the patches. In [19] although a much more compactness in size is introduced, while the isolation is improved by more than 14 dB.…”

Reconfigurable Microstrip Printed Patch Antenna for Future Cognitive Radio Applications

“…Thus, a family of unloaded and loaded compact microstrip patch antennas were proposed, that cover the GPS,GSM,UMTS and LTE services. The proposed unloaded antennas (with and without slot) have demonstrated several advantages over previous works in [5][6][7][8][9][10][11][12][13][14][15], for example it has a smaller size compared to work in [ 5,6,8,9,10], and also shows a better gain in contrast to previous work in [5,7,9,10,15]. On the other hand, the proposed tunable design (third version), achieves a wider continuous tuned frequency range compared to works [18][19][20][21][22][23]; in addition, this version provides a degree of miniaturization compared to works in [ 18,19,20,22].…”

“…To meet the requirement of the newly launched LTE service, the microstrip antenna design has to be revisited. Several microstrip patch antennas which are capable of operating over the LTE bands have been reported [11][12][13][14][15]. Although each of these designs are optimal for specific technologies, it is clear that a single flexible antenna structure that can operate over LTE and legacy WLAN and 3G is required.…”

Array of 8 Circularly Polarized Microstrip Antenna for 802.11ac MIMO WLAN

“…Low mutual coupling between antenna in MIMO become important consideration in designing the MIMO antenna. Many researches in designing MIMO antenna reported the low level mutual coupling is achieved at -20dB to 27 dB [8][9][10][11]. Several number methods have been studied and proposed for suppressing the mutual coupling between elements in microstrip array antenna.…”