A miniaturized planar antenna with defective ground structure for UWB applications

Venkatachalam, Dinesh Kumar; Murugesan, G.

doi:10.1587/elex.16.20190242

Cited by 14 publications

(8 citation statements)

References 27 publications

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“…[7] presents a monopole antenna with a meander line exhibiting an ultra-wide bandwidth. [8,9] propose UWB antennas with defective ground in planar forms. [10] presents a dual-band E-type monopole antenna for laptop computers.…”

Section: Introductionmentioning

confidence: 99%

VHF/UHF wideband slim monopole antenna with meander line loading and slot-modified ground designed by characteristic mode analysis

Qin

Sun

Zhou

et al. 2022

IEICE Electron. Express

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This letter presents a wideband slim monopole antenna operating on very-high-frequency (VHF) and ultra-high-frequency (UHF) bands. The monopole antenna is composed of a slim strip and a meander line loading. The monopole antenna is vertically mounted on the case of the radio station which is served as ground and modified with slots. The method of characteristic mode analysis (CMA) is used to design the proposed antenna. By loading the meander line, the resonant frequency of the characteristic mode 1 of the proposed antenna moves to the lower band and higher modes are effectively excited at the higher band, which leads to a wide impedance bandwidth. Moreover, by loading the slots on the case, the inverse currents of characteristic mode 3 on the case at higher band, having bad effects on radiation patterns, are canceled out. Hence, the gain at horizontal plane at higher band is improved. A prototype of the proposed antenna with a slim structure is fabricated and measured. The bandwidth (VSWR≤3:1) is 200-550 MHz (93.3%). The gain is greater than 0.5 dBi in the working band. The proposed antenna has omnidirectional radiation patterns and is suitable for backpacked radio station applications.

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Section: Introductionmentioning

confidence: 99%

VHF/UHF wideband slim monopole antenna with meander line loading and slot-modified ground designed by characteristic mode analysis

Qin

Sun

Zhou

et al. 2022

IEICE Electron. Express

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show abstract

“…Several methods of enhancing the performance of microstrip antennas have been reported in many literatures. Patch antennas with partial ground plane [1], [2], patch antenna with defected ground structure (DGS) that can be used for UWB application was proposed in [3]. The DGS significantly controls the impedance bandwidth and improves the radiation characteristics of monopole antennas by suppressing the higher modes of harmonics and reduce mutual coupling between adjacent elements [4], [5].…”

Section: Introductionmentioning

confidence: 99%

“…Better isolation > 20dB and good impedance matching are achieved by shaping the slot arms and feed section suitably and inserting narrow metallic stubs. In [14], The use of two element MIMO for UWB with reduced mutual coupling is proposed, and the middle portion of the ground structure is expanded outward to provide better isolation of > 20dB over the entire UWB with a size of 40801.6mm 3 . An UWB semi-ring MIMO antenna with a size of 50×90×1.52mm 3 and isolation > 10dB on the entire band is indicated in [10].…”

Section: Introductionmentioning

confidence: 99%

Quad-Element MIMO Antenna with Enhanced Isolation for UWB Applications

Bsrat¹,

Aruna²,

Naik³

2022

ECS Trans.

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This study proposes a quad-element MIMO antenna for ultra-wideband applications. Several design evolutions have been carried out in order to achieve a UWB impedance bandwidth and good positive gain across UWB frequency ranges. In MIMO antenna construction, the best-performing antenna design is used as a basic radiator element. S-parameters, gain, radiation pattern, and diversity performance findings are used to investigate dual and quad-element MIMO antenna designs with various layouts. As a result, the proposed quad-element MIMO antenna operates in the frequency range of 3.5-11.2 GHz with >-20dB isolation in the majority of the operating band. The ECC and DG values are both less than 0.006 and greater than 9.9, respectively, while the MEG and CCL are within acceptable ranges. The simulated findings agree well with the measured results.

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“…Since the ruling of wideband technology by the Federal Communication Commission [1], the wideband antennas have drawn more attention for use in many applications such as modern high-speed wireless communication systems [2,3,4,5]. For example, different types of wideband antennas with relatively good performance in published works [6,7,8,9,10,11] have been developed. However, compared with circular polarized antennas [12,13,14,15,16,17,18], these wideband linearly polarized antennas are more likely to cause polarization mismatch.…”

Section: Introductionmentioning

confidence: 99%

A wideband and low-cost square radial line slot array antenna for circularly polarized applications

Zhang

Wang

2020

IEICE Electron. Express

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A circularly polarized radial line slot array with enhanced bandwidth is presented in this letter. The proposed antenna consists of two parallel plates, a monopole probe and a spiral slot array. The parallel plates form a radial cavity and is fed by the probe. Then, the spiral slot array etched on the upper substrate can be excited by the radially outward wave to provide broadside radiation. In this design, the side wall of the cavity is left open, which helps to obtain wideband operation and has little effect on radiation patterns. To enhance the bandwidth further, a square cavity is used here to substitute for an initial circular one. With such a structure, the antenna is wide in bandwidth and compact in size. The proposed antenna is designed and fabricated. Measured results reveal that the antenna can provide an impedance bandwidth of 37.2% (15.1-22.0 GHz) and an axial ratio bandwidth of 31.0% (15.0-20.5 GHz), respectively. Additionally, the measured maximum gain is 26.7 dBic at 17.5 GHz.

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A miniaturized planar antenna with defective ground structure for UWB applications

Cited by 14 publications

References 27 publications

VHF/UHF wideband slim monopole antenna with meander line loading and slot-modified ground designed by characteristic mode analysis

VHF/UHF wideband slim monopole antenna with meander line loading and slot-modified ground designed by characteristic mode analysis

Quad-Element MIMO Antenna with Enhanced Isolation for UWB Applications

A wideband and low-cost square radial line slot array antenna for circularly polarized applications

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