Dual-band slot-loaded patch antenna

A Dual-Band Slot-Embedded Microstrip Antenna for Dual-Polarization Operation

“…Different techniques and geometries of multi-band antennas have been proposed in the last several years to produce either the same polarization or different polarizations in the frequency bands. One of the main techniques to design dual-band antennas is by inserting slots on the patch; for example, two narrow and parallel slots can be inserted near to the radiating edges of a rectangular patch [1,2]. A bow-tie microstrip antenna for dual-band operation has been demonstrated in [3].…”

“…Therefore, this structure works in a single band with CP radiation. However, the slot-loaded antennas mentioned in [1][2][3][4][5][6][7][8] act as dual-band antennas because the loaded pair of slots introduces another higher order resonant frequency and modifies the current distribution on the band to obtain a radiation pattern similar to the lower resonant frequency [1]. In [10], an aperture coupled square microstrip patch with a dual-band polarization reconfigurable capability has been described for wireless local area network (WLAN) systems.…”

“…Moreover, this dual-band antenna can be modified to be assigned to global positioning system (GPS) and Wi-Fi applications because CP is vital for GPS antenna to obtain optimal performance, and an LP antenna is enough to support the Wi-Fi communication. Following the basic concept of [1,2], two narrow and parallel slots are loaded on an X-band patch so that the proposed antenna can simultaneously operate at X-and Ku-band. CP at X-band and LP at Ku-band are achieved by placing the feed port along a diagonal line of the patch.…”

Design Investigation of a Novel Dual-Band Circularly-Polarized Microstrip Antenna for 2.4 GHz and 5.7 GHz

“…To obtain a CP patch antenna at lower band, size of the patch is normally same as the size of a regular patch working at the fundamental mode, which is generally big size [6]. To achieve a small size dual-band CP antenna with a low frequency band, a novel design based on a single-layer slit-loaded square microstrip antenna has been proposed [7], [8].…”

Compact Size and Dual Band Semicircle Shaped Antenna for Mimo Aplications

“…Therefore, the increasing need of dualband antennas with light weight and low profile has stimulated comprehensive researches to pursue cost-effective antenna designs. As well known, conventional microstrip antennas have these advantages at the expense of insufficient bandwidth and awkward dimensions [6,7] while traditional slot-loaded planar inverted-F antennas (PIFAs) possess wider bandwidths at the cost of complexity in their dual mechanism [8,9]. CPW-fed antennas have attracted more attention owing to the fact that CPW-fed antennas have the characteristics of broadband and feasibility of dual-band operations [10,11].…”