Cyclic staggered communications network with switched antenna polarization diversity
A system and apparatus is provided to reduce signal routing, area and signal loss in double-pole, double-throw (DPDT) switch implementations in wireless and millimeter-wave front ends. A cyclic staggered arrangement of receivers, transmitters and antenna ports connecting with DPDT switches reduce signal cross-over and allow for compact, low-loss multi-antenna configurations.
1. A cyclic staggered multi-antenna communications system comprising:
a circular arrangement of a plurality of antennas;
a plurality of transceivers centrally located within the circular arrangement and operatively connected to one or more of the plurality of antennas for processing communication signals, each transceiver including a transmitter and a receiver; and
wherein the plurality of antennas includes a plurality of dual-polarized antenna pairs each dual-polarized antenna pair including at least a first antenna with a first polarization and a second antenna with a second polarization, the first antenna and second antenna transmitting and receiving the communications signals;
a first group of switches; and a second group of switches,
wherein the transmitter is connectable, via the first group of switches, one antenna of a first dual-polarized antenna pair, wherein the receiver is connectable, via the second group of switches, to another antenna of a second dual-polarized antenna pair, and wherein the first dual-polarized antenna pair and the second dual-polarized antenna pair share a same physical one of the first antenna with the first polarization but include different physical ones of the second antenna with the second polarization.
2. The cyclic staggered multi-antenna communications system according to claim 1 , wherein a transceiver of the plurality of transceivers is connected to the at least one antenna through a quarter wavelength transmission line with a transmitting/receiving selection switch and an antenna polarization selection switch.
3. The cyclic staggered multi-antenna communications system according to claim 2 , wherein the communications system transmits or receives with 45° polarization when the antenna polarization selection switch remains open at both a vertical polarization port and a horizontal polarization port, wherein each port is located at spaced antenna connection points along the circular arrangement.
4. The cyclic staggered multi-antenna communications system according to claim 1 , wherein polarization of the first antenna with the first polarization and the second antenna with the second polarization is one or more of: horizontal and vertical polarization, right-handed and left-handed circular polarization or combinations thereof.
5. The cyclic staggered multi-antenna communications system according to claim 1 , wherein the first group of switches and the second group of switches are connected with at least one of: transmission lines or spiral inductors.
6. The cyclic staggered multi-antenna communications system according to claim 1 , wherein the first group of switches and the second group of switches comprise deep-Nwell NMOS switches with positive body bias.
7. The cyclic staggered multi-antenna communications system according to claim 1 , wherein the polarized paired antennas include one polarized antenna utilized for high priority communications and a lower priority antenna utilized for lower priority communications.
8. The cyclic staggered multi-antenna communications system according to claim 1 , further comprising at least one of: an additional unpaired transmitter, an additional unpaired receiver, a terminal polarized antenna or one or more lower priority polarized antennas.
9. A cyclic staggered multi-antenna communications system comprising:
a circular arrangement of a plurality of antennas, wherein the circular arrangement of the plurality of antennas is terminated using one additional transmitter or receiver at a terminal end;
a plurality of transceivers centrally located within the circular arrangement and operatively connected to one or more of the plurality of antennas for processing communication signals; and
wherein the plurality of antennas includes a plurality of paired polarized antennas associated with each of the plurality of transceivers, the plurality of paired polarized antennas including at least a first antenna with a first polarization and a second antenna with a second polarization, the first antenna and second antenna transmitting and receiving the communications signals; and
a first group of switches selectively connecting a transmitter or a receiver, of the plurality of transceivers, to at least one antenna from each of the plurality of paired polarized; and a second group of switches selectively connecting a transmitter or a receiver, of the plurality of transceivers, to at least one antenna from a physically adjacent pair of the plurality of paired polarized antennas.
10. A cyclic multi-antenna communication system comprising:
a plurality of paired transmitters and receivers for processing communication signals;
a circularly arranged plurality of dual-polarized antenna pairs, each dual-dual-polarized antenna pair including at least a first antenna with a first polarization and a second antenna with a second polarization, the first antenna and second antenna transmitting and receiving the communications signals;
a first group of switches; and a second group of switches,
wherein a first paired transmitter is connectable, via a first group of switches, one antenna of a first dual-polarized antenna pair, wherein a corresponding paired receiver is connectable, via a second group of switches, to another antenna of a second dual-polarized antenna pair, and wherein the first dual-polarized antenna pair and the second dual-polarized antenna pair share a same physical one of the first antenna with the first polarization but include different physical ones of the second antenna with the second polarization.
11. The cyclic multi-antenna communication system according to claim 10 , wherein polarization of the first antenna with the first polarization and the second antenna with the second polarization is one or more of: horizontal and vertical polarization, right-handed and left-handed circular polarization or combinations thereof.
12. The cyclic multi-antenna communication system according to claim 10 , wherein the first group of switches and the second group of switches are connected with at least one of: transmission lines or spiral inductors.
13. The cyclic multi-antenna communication system according to claim 10 , wherein the first group of switches and the second group of switches comprise deep-Nwell NMOS switches with positive body bias.
14. The cyclic multi-antenna communication system according to claim 10 , wherein the cyclic multi-antenna communication system is a phased-array.
15. The cyclic multi-antenna communication system according to claim 10 , wherein the cyclic multi-antenna communication system is operable in a multiple-in, multiple out communications network.
16. The cyclic multi-antenna communication system according to claim 10 , wherein the first antenna with the first polarization is for higher priority communications and the second antenna with the second polarization for lower priority communications.
17. The cyclic multi-antenna communication system according to claim 10 , further comprising at least one of: an additional unpaired transmitter, an additional unpaired receiver, a terminal polarized antenna in a receiver pathway, more than one terminal, or a lower priority polarized antenna in the receiver pathway.
18. The cyclic multi-antenna communication system according to claim 10 , wherein the plurality of paired transmitters and receivers are arranged in an alternating order.
19. The cyclic communications device of claim 10 , wherein the pair of polarized antennas include polarizations of one or more of: vertical, horizontal, circular and dual.
20. The cyclic communications device of claim 10 , wherein the pair of polarized antennas comprise dual polarized antennas and the first polarization and the second polarization include 45° polarization when antenna polarization selection switches are open.