Wideband Printed Dipole Antenna for Multiple Wireless Services

Wang, F. J.; Zhang, J. S.

doi:10.1163/156939307782000389

Cited by 21 publications

(11 citation statements)

References 7 publications

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“…Accordingly, the multiband antenna is desired in many systems. In the literature reviews, there are various multiband antennas that have been developed over the years, which can be utilized to achieve the objectives of multiband operation, for instance, the PIFA [1,2] for using in mobile phone application, the slot spiral antenna [3] for dual band or multiband operation, the triangle-shaped monopole antenna [4], and other [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. Recently, the developing multiband antennas have been improved due to use of the fractal concept.…”

Section: Introductionmentioning

confidence: 99%

A Bidirectional Multiband Antenna With Modified Fractal Slot Fed by CPW

Mahatthanajatuphat¹,

Akkaraekthalin²,

Saleekaw³

et al. 2009

PIER

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Abstract-This paper presents a multiband slot antenna with modifying fractal geometry fed by coplanar waveguide (CPW) transmission line.The presented antenna has been designed by modifying an inner fractal patch of the antenna to operate at multiple resonant frequencies, which effectively supports the digital communication system (DCS 1.71-1.88 GHz), worldwide interoperability for microwave access (WiMAX 3.30-3.80 GHz), IMT advanced system or forth generation mobile communication system (3.40-4.2 GHz), and wireless local area network (WLAN 5.15-5.35 GHz). Manifestly, it has been found that the radiation patterns of the presented antenna are still similarly to the bidirectional radiation pattern at all operating frequencies. The properties of the antennas, for instance, return losses, radiation patterns and gain are determined via numerical simulation and measurement.Corresponding author: C. Mahatthanajatuphat (cmp@kmutnb.ac.th). 60Mahatthanajatuphat et al.

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Section: Introductionmentioning

confidence: 99%

A Bidirectional Multiband Antenna With Modified Fractal Slot Fed by CPW

Mahatthanajatuphat¹,

Akkaraekthalin²,

Saleekaw³

et al. 2009

PIER

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“…It has been used widely in the consumer products for its good characteristics and low cost. Such facts have been comprehensively reported by some papers [1][2][3][4][5][6][7][8][9][10]. On the other hand, the circularly polarized (CP) antennas applied to the modern communication become more and more popular not only in the satellite communication but also in the territorial communications.…”

Section: Introductionmentioning

confidence: 95%

A Wideband Wide-Strip Dipole Antenna for Circularly Polarized Wave Operations

Chi¹,

Bor²,

Deng³

et al. 2010

PIER

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Abstract-A thin dipole antenna is a well-known antenna with linearly polarized wave operation. In this work, a wide-strip dipole antenna is proposed for circularly polarized wave operations. To obtain circularly polarized (CP) wave operations, there are two conditions to be satisfied. One is that the antenna must have two degenerated orthogonal modes with different resonant frequencies. The other is that the phase difference of two orthogonal modes is 90 degrees. To match the first condition, the slab width W is tuned to generate current distributions directed in two different directions. In addition, the second condition is matched by asymmetric feeding point by adjusting the overlapped square width C. The parametric study is completed by the Ansoft HFSS simulator. Simulated results reveal that the CP wave is mainly influenced by the slab width W . The influences of the parameters C and d on the performances of the proposed antenna are also investigated in this paper. Taking −8 dB as reference, there are two working bands for this proposed antenna and the measured center frequencies are 0.66 GHz and 2.04 GHz, respectively, and the corresponding bandwidths are 0.27 GHz (40%) and 1.78 GHz (87%), respectively. In addition, the measured center frequencies and bandwidths of the axial ratio are 1.94 GHz and 0.53 GHz (27%), respectively.Corresponding author: L.-P. Chi (cp531220@ms23.hinet.net). 70Chi et al.

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“…Basically, those balanced circuits designed with careful DM operation concepts [1] have good immunity from CM noises, cancellation of even-harmonic signals, elimination of via holes and etc.. Therefore, RF/Microwave components, such as antennas [2,3], mixers [4][5][6], BPFs [7][8][9][10][11][12][13][14][15], and so on, are realized by their balanced counterparts. Among the conventional mobile devices, the SAW filters are usually employed in front-end modules with operation frequency not exceeding several gigahertzs (roughly around 3 GHz) because of their physical nature.…”

Section: Introductionmentioning

confidence: 99%

Stopband-Extended Balanced Filters Using Both Λ/4 and Λ/2 Sirs With Common-Mode Suppression and Improved Passband Selectivity

Lin¹,

Yeh²

2012

PIER

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Abstract-Benefitting from the simultaneous utilization of quarterwave (λ/4) and half-wave (λ/2) microstrip resonators, a via-free balanced bandpass filter (BPF) with direct-coupled scheme is presented in this study. In the beginning, a single-ended filter with transmission zeros (TZs) is newly proposed and the mechanism of creating two TZs around the passband without necessitating cross couplings is adopted. The TZs can be made structure-inherent based on the coexisted out-of-phase couplings among a coupled-resonator pair. On the foundation of the presented single-ended filter, a balanced filter featuring extended differential-mode (DM) stopband, good commonmode (CM) suppression, and improved passband selectivity has been designed and implemented. The DM stopband extension is achieved by misaligning the higher-order harmonic frequencies of each resonator in the DM bisected circuit while the CM suppression is accomplished by both harmonic misalignment and careful designed coupled structure in the CM bisected circuit. Eventually, a demonstrated balanced filter centering at 1.5 GHz possesses DM stopband extended up to 8f d 0 , where f d 0 denotes the DM operation frequency, and its CM rejection ratio (CMRR) within DM passband better than 51.9 dB is attained. For measurement convenience, the DM characterizations have been accomplished by 2-port network analyzer with simple rat-race baluns and are found relatively accurate within the −15 dB bandwidth of the utilized baluns.

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Wideband Printed Dipole Antenna for Multiple Wireless Services

Cited by 21 publications

References 7 publications

A Bidirectional Multiband Antenna With Modified Fractal Slot Fed by CPW

A Bidirectional Multiband Antenna With Modified Fractal Slot Fed by CPW

A Wideband Wide-Strip Dipole Antenna for Circularly Polarized Wave Operations

Stopband-Extended Balanced Filters Using Both Λ/4 and Λ/2 Sirs With Common-Mode Suppression and Improved Passband Selectivity

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