Dual-polarization communication antenna for mobile satellite links

摘要

A dual-polarization communication antenna for satellite mobile links comprising a number of radiant elements etched on a substrate, a connector enabling the antenna elements to be connected to a power source, said antenna including one or more subantennas, each of said subantennas including: N dual-polarization antenna elements mounted in series with one another and linked together by means of a portion of a first conduction line C1; K dual-polarization antenna elements linked together by means of a portion of a second conduction line C3, said K antenna elements being arranged relative to one another in parallel; wherein said lines C1, C3 are electrically linked and linked to the connector; and the set formed by the N antenna elements is mounted in series with the set of the K antenna elements.

主权项

1. A dual-polarization communication antenna for satellite mobile links comprising a number of radiant elements etched on a substrate, at least one connector C enabling the antenna elements to be connected to a power source, said antenna comprising one or more subantennas, each of said subantennas comprising:
a first set A1 of N dual-polarization antenna elements arranged in series with one another and linked together by means of a portion of a first conduction line C1, said conduction line being divided into two at a junction point J1 situated between the part of the circuit where the K elements are mounted in series and the part of the antenna where the N elements are mounted in series with one another; a second set A2 of K dual-polarization antenna elements linked together by means of a portion of a second conduction line C3, said K antenna elements being arranged relative to one another in series: wherein the set A1 formed by the N elements arranged in series is mounted in parallel relative to the set A2 of said K antenna elements; said lines C1, C3 are electrically linked and linked to the connector C via a line C2, then a line C4; said line C4 links the lines C2 of the two subantennas to the connector C; from the connector C to the junction point J, said lines C2 and C4 have a given impedance value and the junction points J1 and J2 use impedance transformers to divide the signal into two parts; said conduction line C2 provides the electrical link between the first set of N antenna elements and the second set of K antenna elements; and the impedance Zp of an antenna element is obtained by using the following relationshipsRelationship⁢⁢No.⁢1⁢:⁢⁢X2⁡(j)=P⁡(1)P⁡(j)⁢Γ2⁡(j)⁢X2⁡(1)Relationship⁢⁢No.⁢2⁢:⁢⁢A⁡(j-1)=A⁡(j)K2⁡(j)+ZpX2⁡(j),⁢A⁡(N+1)=0Relationship⁢⁢No.⁢3⁢:⁢⁢Zc=K⁡(j)⁢ZaRelationship⁢⁢No.⁢4⁢:⁢⁢Zb=A⁡(j)⁢Za2 in which A(j) corresponds to the admittance of the impedance transformer, followed by an impedance line Za(j), line λ/4, followed by an impedance line Zb(j): line λ/2, followed by an impedance line Zc(j): line λ/4 and ends with an admittanceA⁡(j)K2⁡(j) λ corresponds to the wavelength of use of the antenna.