US 12,463,345 B2
Small dimension UHF antenna for cubic form satellite
Rifaqat Hussain, Dhahran (SA); Abdullah Mohammed Saeed Algarni, Dhahran (SA); and Sharif Iqbal Mitu Sheikh, Dhahran (SA)
Assigned to KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran (SA)
Filed by KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran (SA)
Filed on May 19, 2025, as Appl. No. 19/211,351.
Application 19/211,351 is a continuation of application No. 18/181,964, filed on Mar. 10, 2023, granted, now 12,308,519.
Prior Publication US 2025/0279586 A1, Sep. 4, 2025
Int. Cl. H01Q 13/10 (2006.01); H01Q 1/28 (2006.01); H01Q 1/48 (2006.01)
CPC H01Q 13/103 (2013.01) [H01Q 1/288 (2013.01); H01Q 1/48 (2013.01); H01Q 13/106 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A dual feed slot-based circularly polarized wideband ultra high frequency (UHF) antenna having dimensions of less than 60 mm by 60 mm for a cubic shaped satellite (Cube-Sat), comprising:
a circuit board having a front side and a back side separated by a dielectric material;
a metallic layer configured to cover the back side of the circuit board, wherein the metallic layer is connected to a ground;
a hexagonal meandered slot symmetrically formed in the metallic layer, wherein the hexagonal meandered slot includes six legs of equal length, wherein the six legs are configured such that the hexagonal meandered slot includes a first vertex located between a first leg and a second leg, a second vertex located between the second leg and a third leg, a third vertex located between the third leg and a fourth leg, a fourth vertex located between the fourth leg and a fifth leg, a fifth vertex located between the fifth leg and a sixth leg, and a sixth vertex located between the sixth leg and the first leg;
a capacitor switchably connected to the metallic layer across the first vertex, wherein the capacitor has a capacitance value of from 3 pF to 16 pF;
a first feed horn connected by a first feed line to a first edge of the front side of the circuit board, wherein an open end of the first feed horn is directed into an inner area of the hexagonal meandered slot between the third vertex and the fourth vertex; and
a second feed horn connected by a second feed line to a second edge of the front side of the circuit board, wherein the second edge is opposite the first edge, such that an opening of the second feed horn extends across the hexagonal meandered slot between the sixth vertex and the second vertex.