Hierarchically elaborated phased-array antenna modules and faster beam steering method of operation
A system substantially updates all the phase shifter values of a phased array antenna by using two “global writes” to update these parameters to all phased-array transformation circuits simultaneously via a serial bus. Antenna elements, each controlled by a phased-array transformation circuit, are individually configured to transform phase and gain according to a register array. The register array has a local register group and a central register group, the local registers physically placed close in proximity to RF chains which each correspond to an element of array antenna, whereby each set of local registers control an individual antenna element and a central register controlling overall beam steering function. Gain values are hierarchically distributed. The apparatus is configured to efficiently elaborate phase shift weights into a submodule of a phase array antenna system with low noise and bandwidth.
1. A system comprising:
a processor circuit for control over an antenna element array by generation of a first operand and a first global write command and a second operand and a second global write command; the processor coupled to
a serial bus on a system printed circuit board which conductively transmits operands and commands, the serial bus coupled to
a plurality of phase-array transformation (PhAT) circuits, whereby the first operand is stored into each of the plurality of PhAT circuits substantially simultaneously and the second operand is stored into each of the plurality of PhAT circuits substantially simultaneously wherein the operands are generated to direct a beam direction.
2. The system of claim 1 wherein the phase-array transformation circuit is electrically coupled to a plurality of antenna elements embedded within a substrate.
3. The system of claim 1 wherein the serial bus includes bus drivers to provide drive capability.
4. The system of claim 1 wherein the processor circuit is one of a micro-controller and a micro-processor.
5. The system of claim 1 wherein the processor circuit has a plurality of serial busses whereby the antenna element array can control a plurality of antenna beams.
6. The phase-array transformation circuit of claim 2 comprising:
a first common register for the first operand; coupled to
a plurality of radio frequency (RF) chains; and
a second common register for the second operand coupled to the plurality of RF chains, whereby weights for each element of the antenna element array controlled by one of the plurality of RF chains is re-computed after at most two global write commands.
7. The phase-array transformation circuit of claim 6 wherein each radio frequency (RF) chain of the plurality of RF chains transforms the first operand stored into the first common register and the second operand stored into the second common register into a phase weight and an amplitude weight suitable for its associated element of the antenna element array.
8. The radio frequency (RF) chain of claim 7 comprising a digital multiplier.