Ultra-Compact Microstrip Antenna Array and Miniaturized Feeding Network

Abstract

Abstract-In this paper, an interdigital resonator that can greatly decrease mutual coupling between adjacent patches is proposed to realize an ultra-compact microstrip antenna array operating in 2.4 GHz wireless communication system. Due to its remarkable performance of decoupling, the edge to edge distance between adjacent patches can be reduced to 0.08λ 0 and even less. Meanwhile, a miniaturized feeding network, which is composed of a CRLH-TL-based phase shifter and T-junction-based power divider, is used to feed the compact antenna array. The simulation results show that the proposed antenna array has an impedance bandwidth of 8.34%. We fabricate the antenna array to verify its performance. The experimental results are in good agreements with the simulations. Compared to the published designs, the proposed antenna array has an ultra-compact structure and hence can be used in space limited communication systems.

Orthonormal method for compact Global Navigation Satellite Systems antenna array designs

“…Moreover, the maximum total efficiency is achieved at f c with a value of −0.5 dB, and also keeps above −1 dB within a range of 20 MHz, being the array more than adequate for the GPS signal bandwidth requirements. It is important to remark that the total efficiency achieved by this AA example is higher than many recently proposed compact designs . The main reason is that these array designs are intended to reduce reflected power at the expense of creating a lossy structure by, for example, employing high dielectric permittivity, fences, resonant structures, or decoupling and matching networks, which actually creates an inefficient array system.…”

“…It is important to remark that the total efficiency achieved by this AA example is higher than many recently proposed compact designs. 4,5,17,18,23,24 The main reason is that these array designs are intended to reduce reflected power at the expense of creating a lossy structure by, for example, employing high dielectric permittivity, fences, resonant structures, or decoupling and matching networks, which actually creates an inefficient array system. However, as we have previously described, it is not necessary to make use of these elements if our approach is adopted.…”

“…In particular, we present a simulated example of microstrip antennas forming a compact array that can behave similar to a ‐spaced AA whose elements have a common RP. It is worth mentioning that the designed array performs efficiently without needing any additional absorber material, resonant structure, fences, or any decoupling and matching network stages . The proposed method intends to turn many efficient coupled AA designs workable with classic phased array techniques.…”

“…It is worth mentioning that the designed array performs efficiently without needing any additional absorber material, resonant structure, fences, or any decoupling and matching network stages. 4,5,[16][17][18] The proposed method intends to turn many efficient coupled AA designs workable with classic phased array techniques.…”

A Novel Configuration of a Miniature Printed Antenna Array Based on Defected Ground Structure

“…On the other side, many researchers have demonstrated that use the electromagnetic bandgap (EBG) structure [16 -18] or the neutralization lines technique [19 -21] are able to reduce the mutual coupling between the closely spaced radiating elements and actually to have a small-size antenna array. As the techniques develop, some interdigital resonators with simpler structures are studied to decrease the mutual coupling between the adjacent patches and simultaneously to realize an ultracompact microstrip antenna array [22]. These techniques are, however, more complex and cannot always be implemented, due to requirements on simplicity and versatility.…”