Dice-Five Polarization-Agile Corner-Fed Patch Array Antenna

Abstract

A novel planar polarization‐agile microstrip subarray is proposed and its performance assessed by a thorough numerical investigation. The subarray consists of five square patches with a central element, directly coupled to a pair of microstrip feed lines by a cross‐shaped aperture, which spreads the power outwards to the other patches through a network of suitable connections. By properly exciting the antenna at its input ports, any kind of polarization of the radiated field can be accomplished with fairly low cross‐polarization levels. Moreover, since only two feed lines are required to drive the whole subarray, polarization agility is simply and attractively achieved by a single phase‐shift circuit. The design concept is described and the results of the analyses and simulations performed by two completely independent full‐wave approaches are presented and discussed.

Symmetrical series‐fed dual‐polarised microstrip antenna lattice with odd number of radiating elements

“…A concept of such a slot‐coupled single patch is shown in Fig. 2 b and it is similar to the centre radiating element in a polarisation‐agile antenna array presented in [22, 23]. In this element, (i) the part of power delivered through the feeding line to port #1 is further guided through this line to port #2 exciting consecutive parallel linear antenna arrays, (ii) the part of the power coupled to the patch is radiated and (iii) the remaining part of this power is equally split, delivered to ports #3 and #4 with 180° differential phase shift and further distributed to the remaining parts of the linear antenna array.…”

“…In [24], series feeding has been performed with additional microstrip‐line sections, whereas in [9, 10] through‐element feeding has been utilised. The aperture‐coupled microstrip patches presented in this paper, however, have been used to divide and further distribute the excitation signal across an antenna array, which has been realised by combining the methods presented in [15, 22, 23]. The inputs of feeding lines at the bottom metallisation layer are facing outside of the antenna lattice, as shown in Fig.…”

Design of a dual‐polarised antenna with high isolation and a metallic cube for beyond 4G small base station applications

“…In particular, miniaturisation of the antenna is very important. Recently, many researchers have developed base station antenna with dual-polarisation [2][3][4][5][6][7][8][9][10]. However, the size of the antennas are large and antennas structure are very complex.…”

Design of a dual‐polarized small base station antenna with metallic cube for beyond 4G systems

“…The miniaturization of the antenna is also particularly important. A dual‐polarized antenna using electric and magnetic fields is used . Many researchers have developed base station antennas having dual‐polarization.…”