Frequency Reconfigurable Planar Inverted-F Antenna (Pifa) for Cell-Phone Applications

Abstract

Abstract-In this paper, a frequency reconfigurable antenna for cell-phone applications is presented. The proposed structure is based on a conventional PIFA. In addition, two stubs, each with a varactor diode, are incorporated. In order to achieve the wideband characteristic, the first two resonant frequencies (f 1 and f 2 ) of the proposed antenna are controlled independently by the supplied voltages with the variation of the capacitances. The equivalent circuit of the varactor diode has been extracted in order to accurately predict the performance of the proposed antenna. In addition, parametric studies regarding the capacitance and antenna length have been conducted. The measurement results show that the proposed antenna has a tunable bandwidth defined by a VSWR < 2.5 of 45.7%

Compact reconfigurable PIFA antenna for wireless applications

“…There are four classes of reconfiguration techniques, frequency reconfigurability [3,5,15,16], radiation pattern reconfigurability [17], polarization [18], and the combination of them [17,19]. Frequency reconfigurability can be achieved by using electronic switches like PIN [2,7,13,20] and varactor diodes [21,22] to adjust the frequency of operation, and by an electromechanical switch (MEMS) [1,23]. In this paper, a new multiband and compact size frequency reconfigurable PIFA is designed to cover the operation bands of mobile application devices.…”

Untitled

“…There are four classes of reconfiguration techniques, frequency reconfigurability [3,5,15,16], radiation pattern reconfigurability [17], polarization [18], and the combination of them [17,19]. Frequency reconfigurability can be achieved by using electronic switches like PIN [2,7,13,20] and varactor diodes [21,22] to adjust the frequency of operation, and by an electromechanical switch (MEMS) [1,23]. In this paper, a new multiband and compact size frequency reconfigurable PIFA is designed to cover the operation bands of mobile application devices.…”

A Novel Technique for Broadband Circular Polarized Pifa and Diversity Pifa Systems

“…Recently, many researches have been conducted on Planar inverted-F antenna (PIFA) [1][2][3][4][5], since they are widely used in wireless communication systems due to advantages such as low profile, light weight, and conformal to the mounting structure. However, PIFAs are usually used for linear polarization, causing severe limitations for practical applications.…”