A Compact Quad-Band Pifa by Tuning the Defected Ground Structure for Mobile Phones

Abstract

Abstract-The development of compact antennas plays an important role in the rapidly growing mobile communication market. This paper presents a novel design technique of the quad-band small internal antenna covering GSM-900/DCS-1800/PCS-1900/IMT-2000 bands. The innovative quad-band built-in handset antenna is developed within the limit of a 44×25×4 mm 3 volume. The following document describes a new idea of increasing operational bandwidth for the compact planar inverted F antenna (PIFA). The proposed compact antenna introduces the open-end slots in the ground plane almost all under the radiating patch. The size reduction method is attractive for practical antenna implementations. In addition, the end user's hand handling effects on the performances of the proposed antenna are studied.

Broadband Modified Rectangular Microstrip Patch Antenna Using Stepped Cut at Four Corners Method

“…MPAs comprise narrow BW that is approximately 1-5%, which is the most major limiting factor for its widespread applications. Most of the previous contributions in this research area were to increase the BW of MPAs [1,2], and therefore, several measures have been introduced to achieve this objective, including modified shape patches, which is a method of modifying the shape of patch [3][4][5][6][7][8], utilization of slotted ground structure [9][10][11][12][13], modification of rectangular and circular patches to rectangular [14] and circular rings [15,16]. Another method includes an impedance matching network method proposed to enhance the MPAs BW [17][18][19].…”

Compact Dual-Frequency Microstrip Antenna Array With Increased Isolation Using Neutralization Lines

“…The decoupling networks [6,7] can be designed to increase port isolation. Mutual coupling can also be reduced by introducing defected ground structure (DGS) [8,9], implementing electromagnetic bandgap structures (EBG) [10] or using neutralization lines [11,12]. Most of the studies presented in literature reveal a single operating band MIMO antenna system.…”

“…Many techniques to reduce the mutual coupling or to increase the port isolation of antenna arrays have been proposed in literatures [3][4][5][6][7][8][9][10][11][12]. The element isolation can be increased by properly arranging the antennas in different orientations, for example, an antenna cube [3].…”

Compact Multiport Array With Reduced Mutual Coupling

“…An alternate method to isolate the highly coupled antennas is by using hybrid couplers [9,10] to form the modedecomposition network between the antennas and their driving ports. Another way to reduce mutual coupling is to introduce defects and slits in the common ground plane between antenna elements [11][12][13][14][15] or use electromagnetic bandgap (EBG) structures [16,17] to suppress the surface wave between them. In addition, the passive and lossless decoupling and matching networks using reactive lumped elements can be used to transform the coupled antenna ports into isolated and matched ports, for example, the design of decoupling network for twoelement arrays in [18,19].…”