Slot‐loaded compact microstrip antenna for dual‐frequency operation

Abstract

frequency band used in many wireless communication applications, the patch size would be only 2 cm = 2 cm and 1.6 cm thick, which is small enough for many applications.The effects of the size and placement of the notches on the operation of the antenna were investigated next. The dimensions N, D, and D were varied, where N governs the 2 ABSTRACT: Dual-frequency operation is achie¨ed from a compact microstrip antenna by loading a pair of narrow slots close to its radiating edges. The two frequencies ha¨e parallel polarization planes and similar radiation characteristics. The ratio between the two operating frequencies ( ) can be tuned in the range 1.14᎐1.24 , which is much smaller than that of similar designs. The abo¨e excellent radiation characteristics are achie¨ed along with an area reduction of ;75% compared to the standard rectangular patch.

Analytical equations for compact dual frequency microstrip antenna

“…In this article we propose the design equations for a compact dual frequency arrow-shaped microstrip antenna [5,6]. The TM 10 and TM 01 mode frequencies of this antenna can be calculated for the coaxial feed or electromagnetically coupled feed.…”

Broadband, high gain slot loaded square microstrip array antenna

“…The additional bands BW 3 and BW 5 are due to the effect of H-slots inserted in the ground plane as they act as secondary resonators. [3,7]. Figure 8 shows the variation of return loss versus frequency of TIBSMAA.…”

“…Patch array antennas can provide much higher gain and bandwidth than a single patch element but additional care should be taken for matching and feed arrangement. Many techniques such as aperture coupling [2], slot loading [3], gap coupling [4], etc. are available in the literature for enhancing the bandwidth and gain of MSAs.…”

Design of square microstrip antenna for dual wideband operation

“…The dual frequency microstrip antenna may also avoid the use of two separate antennas for transmit/receive function in SAR [3]. Dual frequency microstrip antenna are described by many methods such as slot loading in the conducting patch [4], monopole technique [5], dielectric resonator [6], modifying the ground plane [7], use of parasitic branches [8], use of conical radiator [9], etc. In this article, a simple concept has been used in designing a square microstrip antenna to achieve dual band operation using microstrip line feeding.…”

“…In the past several years, SIWs have attracted special attention, which are normally realized by introducing metallic via-holes in dielectric substrates [2,3]. Evidently, standard low-temperature cofired ceramic (LTCC) technology seems to be the most efficient method in the realization of SIW-based components, because of its very flexible three-dimensional integration capabilities, low tolerance in processing and low dielectric loss of LTCC materials [4]. On the other hand, we know that normal SIW filters are built based on rectangular and circular cavities.…”