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Sādhanā

, 44:106 | Cite as

Single- and double-beam reflectarrays for Ka band communication

  • RANIA ELSHARKAWYEmail author
  • MOATAZA HINDY
  • A -R SEBAK
  • ADEL SALEEB
  • EL-SAYED M EL-RABAIE
  • AMR RAGHEB
  • MUHAMMAD ASHRAF
  • SALEH ALSHEBEILI
Article
  • 59 Downloads

Abstract

The Ka band has found applications in satellite, and radar communications. It is also expected that this band will be utilized for 5G applications. This paper presents single- and double-beam microstrip reflectarrays with single layer and compact size for Ka band communications at 28 GHz. Three different unit cells are investigated in this paper. Single- and double-beam reflectarrays are investigated. The reflectarrays are designed at 28 GHz with a physical size of 10λ × 10λ. A pyramidal horn antenna is used for the feeding purpose. The focal-length-to-diameter (F/D) ratio is equal to one. Two different scenarios for single-beam reflectarrays are presented: one with a broadside direction and the other with a 10° tilt angle. The simulation results show that for the broadside single-beam scenario, it is possible to achieve a gain up to 28.5 dB, and a 1-dB gain-bandwidth up to 30.7%. On the other hand, the presented reflectarray for the single-beam design at 10° tilt angle gives a gain of about 26.4 dB, a side lobe level (SLL) of about −15.6 dB, and a 19.3% gain-bandwidth. For the double-beam reflectarray, four different designs at different angles of 5°, 10°, 15°, and 20° have been simulated and compared. Moreover, the simulation results on the double-beam reflectarray show that the double-beam design at 10° is better from the gain and SLL perspectives. Two prototypes for broadside single-beam reflectarrays have been fabricated and measured. The measurement results show a good match with the simulation results. Gain flatness is guaranteed for both the simulated and measured results over the band of interest.

Keywords

Ka band reflectarray 5G single-beam reflectarray double-beam reflectarray 

List of symbols

λo

free space wavelength

N

integer number

\( f_{{o}} \)

center frequency

D

the reflectarray aperture diameter

F

focal length

\( k_{o} \)

free-space wavenumber at the design frequency

c

speed of light

\( \gamma_{i} \)

the ith element phase required to compensate for the delay resulting from the corresponding path

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Copyright information

© Indian Academy of Sciences 2019

Authors and Affiliations

  • RANIA ELSHARKAWY
    • 1
    Email author
  • MOATAZA HINDY
    • 1
  • A -R SEBAK
    • 2
  • ADEL SALEEB
    • 3
  • EL-SAYED M EL-RABAIE
    • 3
  • AMR RAGHEB
    • 4
  • MUHAMMAD ASHRAF
    • 4
  • SALEH ALSHEBEILI
    • 4
    • 5
  1. 1.Electronics Research InstituteDokki, GizaEgypt
  2. 2.Department of Electrical and Computer EngineeringConcordia University MontrealMontrealCanada
  3. 3.Faculty of Electronic EngineeringMenoufia UniversityMenoufEgypt
  4. 4.KACST-TIC in Radio Frequency and Photonics for the e-Society (RFTONICS)King Saud UniversityRiyadhSaudi Arabia
  5. 5.Department of Electrical EngineeringKing Saud UniversityRiyadhSaudi Arabia

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