Probe-Fed linearly-polarized electrically-equivalent microstrip antennas on FR4 substrates

Abstract

This paper describes a simple but efficient procedure for designing electrically-equivalent microstrip antennas on FR4 substrates. Radiation patterns, reflection coefficient magnitude (||), mutual coupling and cross-polarization level of probe-fed linearlypolarized antennas are calculated and discussed. Experimental results of || and radiation patterns of rectangular, elliptical and triangular patches validate the proposed procedure.

Design of Arrays of Linearly Polarized Patch Antennas on an FR4 Substrate: Design of a probe-fed electrically equivalent microstrip radiator

“…mm, b 20 5 = and mm. p 7 = Note these new dimensions are close to those from the former strategy [40],…”

“…One notices, however, a large difference in the crosspolarized radiation [40]. To illustrate these effects, HFSS simulations are shown in Figures 4 and 5.…”

“…new Design proceDure A simple and efficient strategy for designing electrically equivalent microstrip antennas based on their electrical dimensions was recently proposed in [40]. Following this strategy, radiators with rectangular ( Figure 1 According to this strategy, all three antennas exhibit the same 5.9% bandwidth (145 MHz at 10-dB return loss criterion) complying with the ISM band (100 MHz).…”

“…maximum-to-minimum variation of CPLH-P over the operating band, is also presented in Table 1. Following the strategy proposed in [40], radiators can be designed for equivalent performance in terms of bandwidth and copolar radiation patterns but with no control of CPLH-P. To improve this strategy, the H-plane cross-polarization characteristics of the previous antennas were analyzed, aiming at lower CPLH-P over the antenna bandwidth and resistive input impedance at the operating frequency. The starting point was the well-known fact that the cross-polarization level of a rectangular patch is a function of the probe position [42].…”

Performance Analysis of Probe-Fed Circularly-Polarized Moderately-Thick Microstrip Antennas Designed under the Null Reactance Condition

“…Microstrip antennas have been widely used in communication systems due to their many advantages, such as low profile, compatibility with integrated circuit technology, and conformability to a shaped surface. The conventional probe-fed linearly-polarized antenna, comprising a metallic patch printed on top of a thin grounded dielectric layer, is certainly the most popular radiator [1]- [5]. However, this basic structure can only handle low power and operates over a narrow frequency range.…”