Antenna lattice with unequal spacing for single-panel full-duplex satellite user terminals

Abstract

A full-duplex User Terminal Panel (UTP) including one or more User Terminal Modules (UTM) having a plurality of Tx antenna elements. Each of the Tx antenna elements spaced apart from one another by a distance dTx. The full-duplex UTP further includes a plurality of Rx antenna elements. Each of the Rx antenna elements are spaced apart from one another by a distance dRx. Furthermore, the Tx antenna elements may be spaced according to a Tx lattice dTx, such that the Tx lattice dTx spacing arrangement provides grating lobe-free scanning in an elevation plane at a Tx frequency range. The Rx antenna elements are spaced according to an Rx lattice dRx, such that the Rx lattice dRx spacing arrangement provides grating lobe-free scanning in an elevation plane at a Rx frequency range.

1 . A full-duplex User Terminal Panel (UTP) comprising:
 one or more User Terminal Modules (UTM)s, each UTM comprising:
 a plurality of Tx antenna elements, each of the Tx antenna elements spaced apart from one another by a distance dTx; 
 a plurality of Rx antenna elements, each of the Rx antenna elements spaced apart from one another by a distance dRx, wherein the distance dRx is greater than the distance dTx; 
 wherein the Tx antenna elements are spaced according to a Tx lattice dTx, and the Rx antenna elements are spaced according to an Rx lattice dRx 
 wherein the Tx lattice dTx spacing arrangement provides grating lobe-free scanning in an elevation plane at a Tx frequency range; and 
 wherein the Rx lattice dRx spacing arrangement provides grating lobe-free scanning in an elevation plane at a Rx frequency range; and 
 at least one Tx radio frequency integrated circuit (RFIC) configured to transmit a radio frequency (RF) signal, the Tx RFIC comprising one or more Tx channels, each of the Tx channels connected individually to one of the plurality of Tx antenna element ports; and 
 at least one Rx RFIC configured to receive an RF signal, the Rx RFIC comprising one or more Rx channels, each of the Rx channels connected individually to one of the plurality of Rx antenna element ports. 
   
     
     
         2 - 23 . (canceled) 
     
     
         24 . The full-duplex UTP of claim  16 , wherein the Tx antenna element includes a first Tx antenna element port, and the Rx antenna element includes a first Rx antenna element port, the first Tx antenna element port and the first Rx antenna element port having a first orthogonal orientation. 
     
     
         25 . The full-duplex UTP of claim  16 , further comprising:
 a Rx filter connected to one channel of the Rx RFIC and connected to the Rx antenna element port, wherein the Rx filter provides RF signal isolation between the Rx antenna element port and the Tx antenna element port.   
     
     
         26 . The full-duplex UTP of claim  16 , further comprising:
 a Tx filter connected to one channel of the Tx RFIC and connected to the Tx antenna element port, wherein the Tx filter provides RF signal isolation between the Tx antenna element port and the Rx antenna element port.   
     
     
         27 . The full-duplex UTP of claim  16 , wherein adjacent Tx antenna elements and Rx antenna elements are positioned from each other to provide an RF isolation between the plurality of the Tx antenna ports and the plurality of the Rx antenna ports; and
 wherein the RF isolation is achieved via a Tx antenna element keepout region and a Rx antenna element keepout region, the Tx antenna element keepout region disposed about a periphery of the Tx antenna element, and the Rx antenna element keepout region disposed about a periphery of the Rx antenna element.   
     
     
         28 . The full-duplex UTP of claim  16 , wherein the Tx RFC is configured to alter, by each of the Tx RFIC channels, a phase of an outgoing analog signal to each of the one or more Tx antenna element ports;
 wherein the Rx RFIC is configured to alter, by each of the Rx RFIC channels, a phase of an incoming analog signal to each of the one or more Rx antenna element ports; and   wherein the altering of the phase of the outgoing analog signal and the altering of the phase of the incoming analog signal provides a polarization control of the UTP.