A novel approach for miniaturization of slot antennas

Azadegan, R.; Sarabandi, Kamal

doi:10.1109/tap.2003.809853

Cited by 170 publications

(100 citation statements)

References 23 publications

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“…As shown in Fig. 5, the value of inductive loading of the slot increases with V L and consequently, the center frequency decreases [19]. The center frequency increases along with S W , similar to the characteristics of the ordinary slot antenna.…”

Section: Sensitivity Analysissupporting

confidence: 61%

“…3(b). According to the equivalence theorem [23], the Hshaped slot is equivalent to a shortened magnetic dipole with inductive loading [19], which is along the x-direction, depicted as the dashed line in Fig. 2(a).…”

Section: Analysis Of the Antennamentioning

confidence: 99%

“…1) H-shaped slot design: One can follow the design procedure in [19] for the H-shaped slot, but because of the effect of the vertical wall the designed center frequency should be about 10% lower than the desired one. 2) Vertical wall : To achieve a strong coupling between the H-shaped slot and the vertical wall, we suggest that the vertical wall should be close to the edge of H-shaped slot.…”

Section: Design Proceduresmentioning

confidence: 99%

“…Its electrical size can be reduced by the terminal loading method, such as antennas with H-shaped or spiral lines loading slots [19,20]. However, the slot antenna has a bi-directional pattern and is not suitable for many applications that require unidirectional radiation patterns.…”

Section: Introductionmentioning

confidence: 99%

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Novel Unidirectional Slot Antenna With a Vertical Wall

Xue

et al. 2008

PIER

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Abstract-A novel slot antenna that consists of an H-shaped slot encompassed by a rectangular metallic wall and a pair of C-shaped slots outside the wall is proposed. It features a unidirectional pattern, small electrical dimensions and medium gain. The H-shaped slot radiates as an inductively loaded magnetic dipole while the induced electric currents on the vertical wall radiates as electric dipoles. The front-to-back ratio (FBR) of the antenna can be controlled by proper constructive and destructive interferences of radiating fields of the magnetic and electric dipoles. The size of the ground plane can be reduced by the use of the C-shaped slots that confine the currents to the proximity of the metallic wall. Two prototype antennas operating at 2.4 GHz were designed. By adjusting the structure parameters, the front-to-back ratio of the antenna can be conveniently altered. The first prototype has an impedance bandwidth (BW) of 3.8% for SWR ≤ 2, a 4.6 dBi gain, a 10-dB FBR and a ground size of 0.84λ 0 × 0.64λ 0 where λ 0 is the free-space wavelength at the center frequency. The corresponding figures of the second prototype are 1.83%, 4.1 dBi, over 20 dB and 0.64λ 0 × 0.64λ 0 . Both antennas have a height of 0.128λ 0 .

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Section: Sensitivity Analysissupporting

confidence: 61%

Section: Analysis Of the Antennamentioning

confidence: 99%

Section: Design Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Novel Unidirectional Slot Antenna With a Vertical Wall

Xue

et al. 2008

PIER

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“…Recently, various slot structures have been proposed for antenna size reduction. Folding or bending the slot is a conventional approach for size reduction [1]. However, they always lead to very low gain.…”

Section: Introductionmentioning

confidence: 99%

An Interdigital Capacitor Loaded Slot Antenna With Compact Size

Cheng¹,

Li²,

Liu³

et al. 2016

PIER Letters

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Abstract-A new compact interdigital capacitor loaded open slot antenna and its lumped model are presented in this letter. Equivalent model analysis shows that the introduction of the interdigital structure increases the capacitive element of the slot and thus reduces the operating frequency of the slot antenna. And the antenna operating frequency as well as its size can be easily reduced by simply increasing the capacitance of the interdigital capacitor and the characteristic impedance of the slot. Experimental results of the exemplary antenna agree well with those of the full-wave simulation, proving that the proposed open slot antenna structure is viable in antenna design.

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Miniaturized Packaged (Embedded) Antennas for Portable Wireless Devices

Ali

2005

Encyclopedia of RF and Microwave Engineering

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Packaged (embedded) antennas are becoming more and more in need with the rapid proliferation of wireless communication devices and systems. This include mobile phones, pagers, wireless PDAs, phones with enhanced GPS services, terminals with Bluetooth/WLAN functionalities, and RFID tags for inventory tracking and identification. In this article an overview of miniaturized packaged (embedded) antennas is presented. This includes multiband embedded antennas for mobile phone applications in the 900/1900‐MHz bands, Bluetooth/WLAN in 2.4‐ and 5–6‐GHz bands. Miniaturized planar inverted‐F antennas (PIFAs) are discussed along with wideband monopoles for possible triple‐band applications. Surface‐mount PIFAs, integrated inverted‐F antennas (IFAs), and packaged monopole type radiators are discussed for Bluetooth and WLAN applications. Finally, some future trends in this research area are also discussed.

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A novel approach for miniaturization of slot antennas

Cited by 170 publications

References 23 publications

Novel Unidirectional Slot Antenna With a Vertical Wall

Novel Unidirectional Slot Antenna With a Vertical Wall

An Interdigital Capacitor Loaded Slot Antenna With Compact Size

Miniaturized Packaged (Embedded) Antennas for Portable Wireless Devices

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