Frequency reconfigurable monopole antenna with harmonic suppression for IoT applications

Abstract

This work proposes a new reconfigurable printed monopole antenna for IoT devices working with the promising wireless technology Wi-Fi 6. Based on effective resonant length value, the antenna has the ability to reconfigure its operating band between 2.4 GHz and 5 GHz ISM bands. Therefore, the designed antenna works as an RF band-pass filter which reduces receiver complexity and supports network scalability. One PIN diode with complete biasing circuit is integrated to the antenna radiator to obtain re-configurability. Furthermore, two stubs are added to the antenna structure in order to suppress harmonic component which appears near to the higher band (5 GHz) when antenna forced to work at the lower band (2.4 GHz). The design built over commercially available FR-4 substrate with a compact size of (33.5x16x1.6) mm 3 . CST software is used to simulate antenna performance in terms of flection coefficient, radiation pattern, efficiency, and gain.

Th-Shaped Tunable Multi-Band Antenna for Modern Wireless Applications

“…The works [29][30][31] report a frequency reconfigurable antenna that uses three switches, to cover the frequencies within the sub-6 GHz 5G bands, achieving peak gains up to 3.6 dBi. A frequency reconfigurable monopole antenna is designed in [32], for 5.6 and 2.4 GHz Unlicensed Industrial, Scientific, and Medical (ISM) bands, depending upon the state of the switch.…”

Circular polarization reconfigurable antenna for mid-band 5G applications with a new reconfigurable technique

“…Polarization reconfigurable antenna (PRA) is a multifunction antenna which has the ability to modify its polarization states at different time by using switches [1,2]. In this type, the reconfigurability can be done among horizontal polarization (HP), vertical polarization (VP), polarization with a specific angle, left-hand circular polarization (LHCP), and right-hand circular polarization (RHCP) [3,4].…”

A multiband and wideband frequency reconfigurable slotted bowtie antenna

“…The configurations can be switched between the same mode or to another type of mode. For example, narrow-to-narrowband [3], narrow-to-wideband [4,5], multi-tomultiband [6][7][8][9][10], multi-to-wideband [11][12][13][14][15][16][17][18], wide-to-wideband [19] and wide-to-narrow-to-multiband [20,21] configurations have been proposed and discussed. However, in this paper, we only focus on configurations of narrow-to-wideband and multi-to-wideband.…”

“…The antenna provides dual-band mode at 1.8 GHz and 5.2 GHz, and a wideband mode at 1.6 GHz to 2.37 GHz. All antennas presented in [2,3,[8][9][10][11][12][13][14][15] have switched multi or narrowband mode within the wideband frequency range. If the multi or the narrowband mode is outside the wideband range, narrow-and-wideband modes can be operated simultaneously as shown in [22].…”

“…Only one of them operates in wideband mode whereas the others operate in narrow-and-wideband mode. This type of antenna offers more functionality compared to [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] by covering wider operating bands.…”