Compact multiband multimode frequency reconfigurable antenna for heterogeneous wireless applications

Abstract

This article presents a compact multiband, multimode frequency reconfigurable antenna for heterogeneous wireless applications. The antenna features a simple geometrical configuration consisting of a triangular monopole antenna loaded with three stubs. By adjusting the biasing condition of the three embedded diodes, six different operation modes are achieved that are wideband, single narrow band, dual-band, and triband operational modes. The proposed antenna offers an acceptable gain, omnidirectional radiation pattern, and high efficiency. The antenna prototype was fabricated and tested to validate its performance. The strong agreement between simulated and measured results confirms the suitability of the proposed antenna for modern wireless applications, requiring multiband and multimode compact antennas.

Compact 3-bit Frequency Reconfigurable Monopole Antenna Realized with a Switchable Three-Line Section

“…The antenna, as an indispensable part of the modern wireless communication system, has been continuously studied since it was invented many years ago. Reconfigurable antennas are becoming increasingly significant due to the multifrequency and multimode requirements of modern wireless communication and limited space for antenna occupancy [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. These antennas possess several outstanding advantages, such as reconfigurability, size miniaturization, versatility, and a decrease in the number of antennas in a complex wireless system.…”

“…These antennas possess several outstanding advantages, such as reconfigurability, size miniaturization, versatility, and a decrease in the number of antennas in a complex wireless system. The reconfiguration of an antenna can be roughly classified into frequency reconfiguration [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17], polarization reconfiguration [18], and radiation pattern reconfiguration [19]. Frequency reconfiguration has been extensively investigated in the past few years.…”

“…The FRAs can also have a discretely switchable working frequency, and it may be realized by introducing switches, such as RF p-i-n diode switches [4][5][6][8][9][10][12][13][14][15][16] or microelectron-mechanical system (MEMS) switches [7,17]. In [4,5], frequency-reconfigurable microstrip patch antennas (MPAs) were presented with several different stubs connected to the main patch via switches.…”

“…Microstrip monopole antennas (MMAs) are featured with low-profile characteristics and easy integration [20][21][22], and they have been adequately utilized for frequency reconfiguration [11][12][13][14][15][16]. A frequency-reconfigurable MMA with an ultrawideband mode was invented, and the reconfigurability was realized by using a slotted ground inserted with four p-i-n diodes, which has five different filtering states [12].…”

“…A frequency-reconfigurable MMA with an ultrawideband mode was invented, and the reconfigurability was realized by using a slotted ground inserted with four p-i-n diodes, which has five different filtering states [12]. Six different operation modes are achieved using a triangular monopole antenna loaded with three stubs by adjusting the biasing condition of the three embedded diodes [13]. In [14], four p-i-n diodes are inserted on the antenna surface to vary the current distribution and adjust the resonant frequencies with different combinations of switches.…”