Ultra Wideband CPW-Fed Aperture Antenna With Wlan Band Rejection

Habib, Mohamed A.; Bostani, Ali; Djaiz, A.; Nedil, Mourad; Yagoub, M.C.E.; Denidni, Tayeb A.

doi:10.2528/pier10011905

Cited by 58 publications

(43 citation statements)

References 23 publications

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“…The beam pattern could vary from one pulse transmission to another because of heat and other uncontrollable natural factors that affect the internal circuitry. The other is the fixed error of antenna system itself [33][34][35], which will bring a constant error of magnitude and phase in the image pair This error can be corrected during the compensation of the registration error.…”

Section: The Coherence Improving Algorithmmentioning

confidence: 99%

Novel Pre-Processing Techniques for Coherence Improving in Along-Track Dual-Channel Low Frequency Sar

Fan¹,

Huang²,

Jin³

et al. 2012

PIER

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Abstract-The coherence between the complex image pair from two channels is important for improving the capability of alongtrack interferometry (ATI) processing in synthetic aperture radar (SAR) ground moving target indication (GMTI). The along-track dual-channel low frequency SAR can be easily influenced by not only mismatch errors of the image pair but also the radio frequency interference (RFI). RFI has great impacts on the joint probability density function (PDF) of magnitude and phase in the interferometric image. However, little work has been done to investigate the coherence improvement under RFI. This study develops an algorithm to improve the coherence of the image pair for along-track dual-channel low frequency SAR, which can be used by ATI. After analyzing RFI imaging in detail, it is proposed that the along-track interferometric image in the range frequency and cross-range slow time domain can be used to detect RFI. Median filters are proposed to further suppress RFI. This suppression has the same implementations to the image pair without heavy computation load. Considering RFI suppression and mismatch errors compensation, a pre-processing flow is proposed to achieve high coherence of the interferometric image in low frequency SAR. It is shown that the coherence of the complex image pair can be improved greatly by using this pre-processing flow. The effectiveness of this algorithm is demonstrated with real data acquired by an airborne along-track dual-channel P-band SAR GMTI system.

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Section: The Coherence Improving Algorithmmentioning

confidence: 99%

Novel Pre-Processing Techniques for Coherence Improving in Along-Track Dual-Channel Low Frequency Sar

Fan¹,

Huang²,

Jin³

et al. 2012

PIER

View full text Add to dashboard Cite

show abstract

“…As antennas are key components of any UWB wireless system, it is essential that they have UWB performance particularly with respect to impedance and radiation characteristics. Also, in these systems, high-performance antennas are required to have the characteristic of low-profile [2][3][4]. Compared with the traditional wide band antennas such as Vivaldi, log-periodic and spirals, slot antenna becomes an attractive candidate to realize a broadband and UWB characteristics due to its low profile, wide bandwidth, compact size, low cost, and ease of fabrication as well as easy integration in active components and monolithic microwave integrated circuits [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

A Compact Uwb Antenna Design Using Rounded Inverted L-Shaped Slots and Beveled Asymmetrical Patch

Dastranj¹,

Bahmanzadeh²

2018

PIER C

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Abstract-A compact ultra-wideband (UWB) antenna with simple structure is presented. To achieve UWB performance with a compact size, two open ended rounded inverted L-shaped slots are etched on the square ground plane. Moreover, further bandwidth enhancement is obtained by cutting a bevel on the asymmetrical radiating patch. The antenna is fed by a 50 Ω microstrip line and has a small size of 28 × 28 × 1.6 mm 3 . The simulation time-and frequency-domain results obtained from HFSS simulator package are verified by experimental measurements. Both simulated and measured results show that the antenna can provide a wide impedance bandwidth of more than 129% from 2.7 to 12.55 GHz with −10-dB reflection coefficient. Besides, it is shown that by introducing several antenna designs, the impedance bandwidth can be enhanced from 58% to 129%. The effects of the key design parameters on the antenna impedance bandwidth are also investigated and discussed. Measured results for the reflection coefficient, far-field radiation patterns, radiation efficiency, gain, and group delay of the designed antenna over the UWB spectrum are presented and discussed. Measured data show good concordance with the numerical results. Also, the fidelity factor is calculated in both E-and H-plane by using CST Microwave Studio. The obtained results in both time-and frequency-domain indicate that the antenna is a good option for UWB applications.

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“…Modern wireless ultra-wideband (UWB) communication systems have received considerable attention owing to their high data rates, great capacity, low complexity and low operating power level [1][2][3][4][5]. In these systems, high-performance antennas are required to have the characteristics of both UWB and low-profile.…”

Section: Introductionmentioning

confidence: 99%

Investigation of a Low-Profile Planar Monolayer Uwb Antenna With an Open Slot for Bandwidth Enhancement

Dastranj¹,

Abbasi-Arand²

2015

PIER C

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Abstract-A low-profile planar monolayer antenna for ultra-wideband (UWB) operation is presented. To achieve a UWB performance along with a compact size, a hybrid square-circular radiator and a rectangular open slotted ground plane with two symmetrical I-shaped tuning stubs are proposed. The antenna is fed by a coplanar waveguide line and has a small size of 44 × 32 × 1.6 mm 3 . The prototype of the proposed antenna was fabricated and tested in an anechoic chamber. The simulated and measured results show good agreement over the entire ultra-wide bandwidth. The measured results indicate that the proposed antenna can provide a wide impedance bandwidth of more than 154% from 1.7 to 13.3 GHz with −10-dB reflection coefficient. In addition, it is demonstrated that by introducing several antenna designs, the impedance bandwidth can be improved from 43% to 154%. Besides several mechanical advantages, such as compact in size, easy fabrication, and monolayer configuration without any back ground plane, the proposed antenna also shows a good performance in its radiation characteristics and time-domain behaviors. The measured results in both frequency and time domains prove that the proposed antenna can be used in a wide range of UWB applications.

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Ultra Wideband CPW-Fed Aperture Antenna With Wlan Band Rejection

Cited by 58 publications

References 23 publications

Novel Pre-Processing Techniques for Coherence Improving in Along-Track Dual-Channel Low Frequency Sar

Novel Pre-Processing Techniques for Coherence Improving in Along-Track Dual-Channel Low Frequency Sar

A Compact Uwb Antenna Design Using Rounded Inverted L-Shaped Slots and Beveled Asymmetrical Patch

Investigation of a Low-Profile Planar Monolayer Uwb Antenna With an Open Slot for Bandwidth Enhancement

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