Design of Dielectric-Covered Planar Arrays of Longitudinal Slots

Casula, Giovanni Andrea; Montisci, Giorgio

doi:10.1109/lawp.2009.2021963

Cited by 32 publications

(44 citation statements)

References 11 publications

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“…The design frequency is 10 GHz; the coupling slot tilt angle is 30 • with a soft orientation ( Figure 5); the slots width and dielectric cover parameters are the same as in Figure 6. The array has been synthesized with the procedure proposed in [12], which neglects the higher-order mode interaction between the coupling and the radiating slots. The simulated far field pattern of the designed array is shown in Figure 18.…”

Section: Offset Radiating Slotsmentioning

confidence: 99%

Accurate Modeling of Coupling Junctions in Dielectric Covered Waveguide Slot Arrays

Mazzarella¹,

Montisci

2011

PIER M

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Abstract-This paper investigates the higher-order modes interaction between a coupling slot and the radiating ones in a dielectric-covered waveguide slot array environment. This interaction can strongly affect the array aperture distribution and input match, mainly when each radiating guide contains few slots or the slots offsets are small. We propose a full-wave Method of Moments approach, taking also into account the waveguide wall thickness, to evaluate this interaction. The use of entire domain basis functions allows to get a small and well-conditioned linear system. The results presented in this paper show that the coupling due to higher-order modes in the region of the junction can significantly modify the array aperture distribution, mainly when the offset is small, and also the array input match, though to a lesser extent.

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Section: Offset Radiating Slotsmentioning

confidence: 99%

Accurate Modeling of Coupling Junctions in Dielectric Covered Waveguide Slot Arrays

Mazzarella¹,

Montisci

2011

PIER M

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“…[37][38][39][40][41] Unfortunately, when the slotted array is covered with a dielectric layer, the external mutual couplings cannot be easily taken into account in comparison with the case when the slots do not cover with any dielectric layers. 39 The current article introduces a straightforward method to design the slotted array antennas covered with dielectric slab without going through a tedious formulation or time consuming measurements. In the proposed design method, the longitudinal slot antenna arrays fed by the waveguides and covered with dielectric slabs are linked to a fictitious loaded slotted array antenna embedded in a large ground plane and covered with a dielectric slab.…”

Section: Introductionmentioning

confidence: 99%

A computer‐aided approach for designing dielectric‐covered planar array antennas consisting of longitudinal slots

Moradian

2018

Int J RF Microw Comput Aided Eng

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A straightforward design approach is proposed to design arrays of longitudinal slots covered with dielectric slabs. The design of the arrays is accomplished via linking the slotted array antennas fed by the waveguides to a corresponding array of the loaded slots cut in an infinite ground plane and covered with dielectric slab. In this regard, the Elliott's design equations are modified for the dielectric‐covered longitudinal slotted array antennas. The introduced design equations are employed to find the final dimensions of the slot antennas while the updated mutual admittances of the corresponding array of the loaded slots are used iteratively in the design equations. Employing the introduced design equations, a two by three slotted array antenna was designed, simulated and tested. The proposed design approach is verified by the simulation and the measurement results.

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“…Furthermore, the loss in a microstrip line becomes much more significant due to the high conductor loss, dielectric loss, and radiation loss in the millimeter wave and upper bands [11,12]. To overcome the drawbacks of the conventional waveguide slot and microstrip antenna arrays, dielectric-covered slot arrays were investigated by Montisci et al [13][14][15][16] and Zheng et al [17], but they did not tell about the monopulse characteristics. Recently, substrate integrated waveguide (SIW) technology based monopulse antenna array is proposed by Cheng et al [18].…”

Section: Introductionmentioning

confidence: 99%

Ka-Band Slot-Microstrip-Covered and Waveguide-Cavity-Backed Monopulse Antenna Array

Liu

Huang

et al. 2014

International Journal of Antennas and Propagation

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A slot-microstrip-covered and waveguide-cavity-backed monopulse antenna array is proposed for high-resolution tracking applications at Ka-band. The monopulse antenna array is designed with a microstrip with2×32slots, a waveguide cavity, and a waveguide monopulse comparator, to make the structure simple, reduce the feeding network loss, and increase the frequency bandwidth. The2×32slot-microstrip elements are formed by a metal clad dielectric substrate and slots etched in the metal using the standard printed circuit board (PCB) process with dimensions of 230 mm × 10 mm. The proposed monopulse antenna array not only maintains the advantages of the traditional waveguide slot antenna array, but also has the characteristics of wide bandwidth, high consistence, easy of fabrication, and low cost. From the measured results, it exhibits good monopulse characteristics, including the following: the maximum gains of sum pattern are greater than 24 dB, the 3 dB beamwidth of sum pattern is about 2.2 degrees, the sidelobe levels of the sum pattern are less than −18 dB, and the null depths of the difference pattern are less than −25 dB within the operating bandwidth between 33.65 GHz and 34.35 GHz for VSWR ≤ 2.

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Design of Dielectric-Covered Planar Arrays of Longitudinal Slots

Cited by 32 publications

References 11 publications

Accurate Modeling of Coupling Junctions in Dielectric Covered Waveguide Slot Arrays

Accurate Modeling of Coupling Junctions in Dielectric Covered Waveguide Slot Arrays

A computer‐aided approach for designing dielectric‐covered planar array antennas consisting of longitudinal slots

Ka-Band Slot-Microstrip-Covered and Waveguide-Cavity-Backed Monopulse Antenna Array

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