Sidelobe level reduction in wide-angle scanning array system using pattern-reconfigurable antennas

Wu, Jen-Chieh; Chang, Chia-Chan; Chin, Ting-Yueh; Huang, Sheng-Lung; Chang, Sheng-Fuh

doi:10.1109/mwsym.2010.5517788

Cited by 11 publications

(4 citation statements)

References 5 publications

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“…The energy coupled to the transmitting built in test may be harvested and used to charge a battery. We can calculate the energy harvesting link budget by using Eqs (16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26), [31], if the antennas are matched and there are no losses in the medium. However, if the antennas are not matched and the RF energy propagates in a loss media, we can calculate the energy harvesting link budget.…”

Section: Hybrid Reconfigurable Structure For Harvestingmentioning

confidence: 99%

“…In the literature, there are several classical beam-steering approaches available: rotating dipole arms or rotating the antenna itself in the orthogonal plane, etc [16]. Phase-controlled array [17], parasitic-patch or stub-controlled antenna [18,19], pixel-based structure [20,21], multilayer or stacked configuration [22], CPW-to-slot-line transition [23,24], monopole or monocone radiator surrounded by a switchable reflector / director array [25], continued research on the nature of beam-steering antennas in various ways. Hybrid/Compound reconfiguration allows multiple antenna parameters, such as frequency and radiation pattern [26] or frequency and polarization [27], to be tuned simultaneously.…”

Section: Introductionmentioning

confidence: 99%

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A novel single-feed hybrid reconfigurable microstrip patch antenna for 5G mobile communication and radio frequency energy harvesting applications at 28/38GHz

et al. 2022

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Reconfigurable antennas have received much attention in RF energy harvesting models owing to their selectivity for operating frequency and polarization. The characteristic of having frequency selectivity and polarization selectivity can be termed as frequency diversity and polarization diversity, respectively. This paper investigates a rectenna device with a new proposed topology in order to eliminate coupling between input and output lines and increase the rectification efficiency with the use of single feed hybrid reconfigurable antenna, switch between 28GHz and 38GHz frequency. Moreover, it is designed to charge a rechargeable battery of 1watt(W). The Reconfiguration mechanism is realized by electronically controlling different states of Switches. PIN Diode (as RLC Equivalent circuit) is used as a switch for ON/OFF states. This antenna mainly comprises rectangular shaped patches (28GHz and 38GHz) with Triango-Truncated edge at the corners. Eighteen PIN Diodes are placed symmetrically throughout the antenna presenting as, S1 & S2 for frequency reconfiguration, S3 to S6 & S7 to S10 connects Triango Truncated edge at the corners for polarization reconfiguration, and for radiation pattern reconfiguration at S11 to S14 & S15 to S18 has been used. The proposed antenna model is capable of simultaneously changing, the radiation patterns as clock and anti-clockwise directions at ±90-degree shift in E and H planes, circularly polarized (CP) states among, Linear Polarization (LP), Right Hand Circularly Polarization (RHCP), and Left Hand Circularly Polarization (LHCP). The current design describes using single antenna for energy harvesting and 5G mobile communication application. This would lead to higher output currents, leading to the ability to efficiently charge a wide variety of batteries. A fully functional prototype has been designed, fabricated and its compound reconfiguration characteristics have been validated for simulated and measured results. For validation of results, the experimental results and the simulation results from the proposed mathematical model were made into comparison, and excellent correlation between the measured and simulated results was obtained.

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Section: Hybrid Reconfigurable Structure For Harvestingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A novel single-feed hybrid reconfigurable microstrip patch antenna for 5G mobile communication and radio frequency energy harvesting applications at 28/38GHz

et al. 2022

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“…However, the non-uniform placement of the array elements results in a low aperture efficiency. Lately, some researchers investigated such solutions as the combination of the amplitude tapering and non-uniform element positions [32], and the use of PRA [33]. However, such solutions lead to high system complexity and inflexibility.…”

Section: Introductionmentioning

confidence: 99%

Use of Subarrays in Linear Array for Improving Wide Angular Scanning Performance

et al. 2019

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The scanning performance of wide-angular scanning linear arrays is primarily degraded by the limited angular profile of the employed elements' patterns. This paper introduces an innovative strategy for compensating this degradation by using subarrays. Our design uses a uniform linear array with half-wavelength spaced elements, supplemented by subarrays that are symmetrically placed at its edges. The employed subarrays have controlled patterns, favoring some directions for effective scan-loss compensation (SLC) and suppressing other directions for lowering the sidelobes level (SLL). Two types of feeding configurations, making use of fixed power dividers in combination with 1-bit phase switch, are used for producing the desired patterns. The complete array design and physical validation, starting from the elements, continuing with the subarrays and ending with the system integration are also discussed in detail. The integration of the subarrays yields notable performance improvements at large scanning angles when compared with uniform linear arrays. The peak and first SLL of −14.1 dB, and the SLC of 2 dB are obtained when the array with CUP antennas as elements is scanned to the maximum scan angle direction.

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“…A similar situation is also reported in Bai et al and Ding et al In addition, Pal et al shows a hybrid high‐impedance‐surface–based phased array with a −60° to +60° scanning range and −10 dB SLLs. Wu et al presents a 1 × 4 phased array with the pattern reconfigurable technique to reduce SLLs to −7.5 dB with the scanning range from −50° to +50°. The above methods provide feasible solutions for the reduction of SLLs, but some difficulties still exist, such as insufficient reduction of SLLs.…”

Section: Introductionmentioning

confidence: 99%

Substrate integrated waveguide‐slot wide‐angle scanning aperiodic phased array with low side‐lobe levels

Sun

Ding

Cheng

et al. 2019

Micro & Optical Tech Letters

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An aperiodic substrate integrated waveguide (SIW) wide‐angle scanning phased array with low side‐lobe levels (SLLs) is presented. The proposed C‐band array has 16 SIW‐slot elements with aperiodic distribution. The TE10 mode of each element is excited to obtain a wide beamwidth for wide‐angle scanning potential. In addition, a genetic algorithm is used to optimize the placement of the elements to reduce the scanning SLLs of the phased array, especially in wide‐angle scanning areas. The proposed approach provides superior performance of SLLs < −11.5 dB, particularly small gain fluctuation (±1.5 dB) when scanning form −68° to +68°. Compared with the same aperture uniform array, the scanning angle and the SLLs of the proposed array have been significantly improved.

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Sidelobe level reduction in wide-angle scanning array system using pattern-reconfigurable antennas

Cited by 11 publications

References 5 publications

A novel single-feed hybrid reconfigurable microstrip patch antenna for 5G mobile communication and radio frequency energy harvesting applications at 28/38GHz

A novel single-feed hybrid reconfigurable microstrip patch antenna for 5G mobile communication and radio frequency energy harvesting applications at 28/38GHz

Use of Subarrays in Linear Array for Improving Wide Angular Scanning Performance

Substrate integrated waveguide‐slot wide‐angle scanning aperiodic phased array with low side‐lobe levels

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