Sidelobe‐level reduction of a linear array using two amplitude tapering techniques

Diawuo, Henry Abu; Lee, Sung Jun; Jung, Young‐Bae

doi:10.1049/iet-map.2016.0883

Cited by 13 publications

(4 citation statements)

References 21 publications

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“…Low SLL is a key characteristic of antennas, as it means reduced interference and improved system performance. Applying amplitude tapering to the array elements is a major technique to realize low SLLs [18]- [20]. However, this normally requires complicated power dividers with different power ratios in the feed network.…”

Section: Introductionmentioning

confidence: 99%

Millimeter-Wave 45° Linearly Polarized Corporate-Fed Slot Array Antenna With Low Profile and Reduced Complexity

You

Skaik

et al. 2021

IEEE Trans. Antennas Propagat.

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A millimeter-wave 45° linearly polarized corporate-fed slot array antenna is presented in this communication. A key feature is the much reduced number of metallic layers and therefore the complexity of the array, as compared with other competitive designs. With the reduced antenna profile, high cross polarization discrimination (XPD) and low sidelobe level (SLL) are still achieved by a combination of techniques. The back cavity of the 2×2-slot sub-array is optimized to confine the Hfield along the direction of the radiation slots, enhancing its XPD. Stubs are loaded in the same cavity to compensate for the phase imbalance, suppressing both cross-polarization and grating lobes without introducing additional metallic layers. Combining these features, the proposed array antenna demonstrates high performance with only three essential metallic layers. A prototype with 8×8 radiation slots at Ka-band is implemented for demonstration. Experimental results show that the grating lobes are suppressed to below -30.5 dB, and the first SLL (FSLL) of less than -26.2 dB. XPD of more than 31.3 dB is achieved over the frequency range of 26.5 GHz -32 GHz. The peak gain of better than 25 dBi and antenna efficiency of over 71.7% are also obtained over the same frequency range.

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Section: Introductionmentioning

confidence: 99%

Millimeter-Wave 45° Linearly Polarized Corporate-Fed Slot Array Antenna With Low Profile and Reduced Complexity

You

Skaik

et al. 2021

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

show abstract

“…Hence, amplitude tapering of microstrip patch array antenna elements can be achieved by changing their width [8,9]. However, most researchers have concentrated on gain enhancement and reduction of side lobe level, but not on beam shaping [10,11]. Therefore, it is proposed to synthesize amplitude excitations for the shaped radiation pattern generation from a compact patch antenna array by unequal widths of the array elements.…”

Section: Introductionmentioning

confidence: 99%

High Gain and Wide Bandwidth Array Antenna for Sector Beam Pattern Synthesis

Maruti¹,

Kishore²

2021

PIER Letters

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This paper presents a novel design structure of a series fed array antenna for desired shaped beam pattern synthesis. The desired beam shape is obtained by varying the width of patch elements. A uniform array is designed for the desired frequency, and then the proportionate values of the widths are calculated using amplitude coefficients obtained from the Woodward Lawson array synthesis method, while keeping excitation phase and inter element spacing constant. The proposed antenna is designed and simulated in HFSS. A prototype is fabricated on FR-4 epoxy dielectric material and tested at 12.5 GHz. The overall antenna has a compact size of 112 mm×34 mm×0.8 mm. The array structure exhibits impedance bandwidth of 1.8 GHz and fractional bandwidth of 15.2%, from 11 GHz to 12.8 GHz frequency range with return loss of −29.6 dB and high gain of 14.7 dB. The series fed configuration results in a VSWR of 1.38 and considerably low side lobe level of −21 dB. There is a fine similarity between simulation and fabrication measurement parameter values such as return loss, VSWR, gain, and bandwidth.

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“…Another classical approach to suppress grating lobes is the aperiodic distribution of the elements [9] or subarrays [10,11] with a tapered amplitude excitation. To this end, non-uniform element separation [12] along with an amplitude tapering was used to reduce grating lobes [13] as well as minor lobes [14]. In addition, the desired minor lobes can be obtained by using different array synthesis methods, e.g., orthogonal [15], Tschebyscheff [16][17][18], and binomial arrays [19,20].…”

Section: Introductionmentioning

confidence: 99%

Addressing Grating Lobes in Linear Scanning Phased Arrays With Self-Nulling Elements and Optimized Amplitude Distributions

Iqbal¹,

Pour²

2021

PIER M

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An effective method to reduce grating lobes in linear scanning phased array antennas with large element spacing of one wavelength is presented. The proposed technique is based on employing self-nulling antenna elements by simultaneously exciting the first two modes in a circular microstrip patch antenna to partially nullify the grating lobes. More importantly, a modified amplitude tapering is optimized in the array level to facilitate the grating lobe reduction for relatively wide scan angles up to ±60 • . Analytical results of a 21-element linear array are fully presented, and a −22.5 dB grating lobe reduction for up to ±60 • scan angles is reported using the proposed method, followed by the results of a smaller array for validation purposes.

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Sidelobe‐level reduction of a linear array using two amplitude tapering techniques

Cited by 13 publications

References 21 publications

Millimeter-Wave 45° Linearly Polarized Corporate-Fed Slot Array Antenna With Low Profile and Reduced Complexity

Millimeter-Wave 45° Linearly Polarized Corporate-Fed Slot Array Antenna With Low Profile and Reduced Complexity

High Gain and Wide Bandwidth Array Antenna for Sector Beam Pattern Synthesis

Addressing Grating Lobes in Linear Scanning Phased Arrays With Self-Nulling Elements and Optimized Amplitude Distributions

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