SIGNAL CONDITIONING MODULES IN PHASED ARRAY ANTENNAS
A phased array antenna system includes a carrier, a first antenna element and a second antenna element coupled to a first side of the carrier, the second antenna element spaced apart from the first antenna element by a space; and a signal conditioning module including a support structure having a first side and a second side opposite the first side, one or more signal conditioning elements coupled to the first side of the support structure, and a plurality of coupling elements coupled to the second side of the support structure. The signal conditioning module is coupled to the first side of the carrier and disposed in the space on the first side of the carrier between the first antenna element and the second antenna element. At least one coupling element is electrically coupled to the carrier. The signal conditioning module is electrically coupled to the first antenna element.
1 . A phased array antenna system comprising:
a carrier;
a first antenna element and a second antenna element coupled to a first side of the carrier, the second antenna element spaced apart from the first antenna element by a space; and
a signal conditioning module including a support structure having a first side and a second side opposite the first side, one or more signal conditioning elements coupled to the first side of the support structure, and a plurality of coupling elements coupled to the second side of the support structure, wherein:
the signal conditioning module is coupled to the first side of the carrier and disposed in the space on the first side of the carrier between the first antenna element and the second antenna element;
at least one of the plurality of coupling elements is electrically coupled to the carrier;
the signal conditioning module is electrically coupled to the first antenna element via the carrier; and
the support structure is spaced from the carrier by the plurality of coupling elements.
2 . The phased array antenna system of claim 1 , wherein the support structure comprises a ground plane.
3 . The phased array antenna system of claim 2 , wherein the ground plane is disposed between the one or more signal conditioning elements and the plurality of coupling elements.
4 . The phased array antenna system of claim 3 , wherein the plurality of coupling elements comprises a plurality of solder balls and the ground plane provides at least partial electromagnetic isolation between the one or more signal conditioning elements and the carrier.
5 . The phased array antenna system of claim 1 , wherein the one or more signal conditioning elements are at least partially covered by one or more layers of an isolation material.
6 . The phased array antenna system of claim 5 , wherein a shielding layer is disposed on at least a portion of the isolation material.
7 . The phased array antenna system of claim 6 , wherein the shielding layer is conductive and electrically coupled to a ground conductor of the signal conditioning module included in the support structure.
8 . The phased array antenna system of claim 6 wherein the shielding layer and the support structure form a continuous enclosure around the one or more signal conditioning elements.
9 . The phased array antenna system of claim 1 , wherein the one or more signal conditioning elements comprises an amplifier.
10 . The phased array antenna system of claim 9 , wherein a first antenna module coupled to the first side of the carrier includes the first antenna element and a second antenna module coupled to the first side of the carrier includes the second antenna element.
11 . The phased array antenna system of claim 10 , wherein the amplifier is electrically coupled to the first antenna element.
12 . The phased array antenna system of claim 11 , wherein:
the amplifier comprises a power amplifier (PA) configured to operate in at least a transmit configuration; and
the amplifier is configured to transmit a transmit signal to the first antenna element in the transmit configuration.
13 . The phased array antenna system of claim 12 , wherein the amplifier is further configured to operate in a calibration receive configuration and receive a calibration signal from at least one of the first antenna element, the second antenna element, or another antenna element of the phased array antenna system.
14 . The phased array antenna system of claim 12 , wherein a pre-amplifier filter is electrically coupled between a transmit signal source and an input of the PA.
15 . The phased array antenna system of claim 14 , wherein the pre-amplifier filter is configured to attenuate signals in one or more RA frequency bands.
16 . The phased array antenna system of claim 12 , wherein a post-amplifier filter is electrically coupled between an output of the PA and the first antenna element.
17 . The phased array antenna system of claim 16 , wherein the post-amplifier filter is configured to attenuate signals in one or more RA frequency bands.
18 . The phased array antenna system of claim 9 , wherein:
the amplifier comprises a low-noise amplifier (LNA) configured to operate in at least a receive configuration; and
the amplifier is configured to receive a signal from the first antenna element in the receive configuration.
19 . The phased array antenna system of claim 18 , wherein the LNA is further configured to operate in a calibration transmit configuration and transmit signals to at least one of the first antenna element, the second antenna element, or another antenna element of the phased array antenna system.
20 . The phased array antenna system of claim 19 , wherein configuring the LNA in the receive configuration comprises configuring a selection switch in a first position, wherein the selection switch is disposed between the first antenna element and the LNA.
21 . The phased array antenna system of claim 20 , wherein configuring the LNA in the calibration transmit configuration comprises configuring the selection switch in a second position.