In-band full-duplex complementary antenna

• US 9,941,598 B2
• Filed: 09/30/2015
• Issued: 04/10/2018
• Est. Priority Date: 09/30/2015
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Suh, Seong-Youp John, Yang, Tae Young, Choi, Yang-Seok
• Primary Examiner(s): CRUTCHFIELD, CHRISTOPHER M
• Application Number:
  US14/871,975
• Publication Number:
  US 20170093050A1
• Time in Patent Office: 923 Days
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 13/10 Resonant slot antennas
• CPC Class Codes: H01Q 13/106 Microstrip slot antennas patch antenna elements H01Q9/0407
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00
• CPC Class Codes: H01Q 25/001 Crossed polarisation dual antennas orthomode horns H01Q13/0258; cross-polarised rear feeds H01Q19/136; orthomode transducers H01P1/161
• CPC Class Codes: H01Q 9/065 Microstrip dipole antennas patch antenna H01Q9/0407
• CPC Class Codes: H01Q 9/16 with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole H01Q9/44 takes precedence
• CPC Class Codes: H01Q 9/285 Planar dipole H01Q9/065 takes precedence; patch antenna H01Q9/0407
• CPC Class Codes: H04B 1/54 using the same frequency for two directions of communication H04B1/44 takes precedence
• CPC Class Codes: H04B 1/56 with provision for simultaneous communication in two directions
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex

Abstract

Described herein are technologies related to an in-band full-duplex wireless communication operation. More particularly, the technologies utilize a complementary pair of antennas for signal transmission and reception arranged in a new manner to be both compact (relatively to conventional approaches) and provide an extremely high (e.g., 60 dB or more) isolation.

Claims

1. An in-band full-duplex (IBFD) antenna system comprising:

a linearly polarized transmission antenna functionally coupled to a wireless transmission subsystem of a wireless device; and

a linearly polarized reception antenna functionally coupled to a reception subsystem of the wireless device, wherein;

both antennas are co-located in the wireless device;

the transmission antenna and the reception antenna are configured to radiate with linear polarization substantially orthogonal to one another when the wireless device is operating in in-band full-duplex mode;

one of the transmission antenna and the reception antenna is a slot antenna having first and second elements, the other one of the transmission antenna and the reception antenna being positioned at least partially within a slot of the slot antenna; and

the slot antenna includes a feed connecting the first and the second elements of the slot antenna, the feed being disposed over the slot and the other antenna within the slot.

2. A system as recited in claim 1, wherein the transmission antenna and the reception antenna are configured to radiate with linear polarization in near true orthogonal direction to one another when the wireless device is operating in in-band full-duplex mode.

3. A system as recited in claim 1, wherein the other one of the transmission antenna and the reception antenna is a dipole antenna.

4. A system as recited in claim 3, wherein dipole antenna is a sleeve dipole antenna.

5. A system as recited in claim 1, wherein the slot antenna is selected from a group consisting of a half-wavelength antenna, quarter-wavelength antenna, electrically-small antenna, impedance-loaded antenna, and material-loaded antenna.

6. A system as recited in claim 1, wherein the other one of the transmission antenna and the reception dipole antenna is positioned completely inside the slot of the slot antenna.

7. A system as recited in claim 1, wherein the transmission antenna and the reception antenna, when the wireless device is operating in in-band full-duplex mode, exhibit an isolation of at least about 60 dB.

8. The system as recited in claim 1, wherein the feed is a coaxial cable slot feed that connects the first and the second elements of the slot antenna.

9. A system as recited in claim 8, wherein the other one of the transmission antenna and the reception antenna is a dipole antenna.

10. A system as recited in claim 1, wherein:

the feed is a coaxial cable slot feed that connects the first and the second elements of the slot antenna; and

the first and the second elements of the slot antenna have a multiple layer planar structure.

11. A system as recited in claim 1, wherein:

the feed is a coaxial cable slot feed that comprises an exposed coax conductor in a portion of the coaxial cable slot feed that is disposed over the slot of the slot antenna and the other one of the transmission antenna and the reception antenna.

12. An antenna system comprising:

a linearly polarized transmission antenna disposed on a substrate and being functionally coupled to a wireless transmission subsystem of a wireless device;

a linearly polarized reception antenna disposed on the substrate and being functionally coupled to a reception subsystem, wherein one of the transmission antenna and the reception antenna is a slot antenna having first and second elements, the other one of the transmission antenna and the reception antenna being positioned at least partially within a slot of the slot antenna; and

a feed that connects the first and the second elements of the slot antenna and bridges over the slot and the other antenna therein, wherein each antenna is configured to radiate with linear polarization substantially orthogonal of each other when the subsystems operate within a common frequency band simultaneously.

13. A system as recited in claim 12, wherein the transmission antenna and the reception antenna are co-located in the wireless device.

14. A system as recited in claim 12, wherein:

the other one of the transmission antenna and the reception antenna is a dipole antenna; and

the dipole antenna is positioned completely within the slot of the slot antenna.

15. A system as recited in claim 12, wherein:

the feed is a coaxial cable slot feed that connects the first and the second elements of the slot antenna; and

the coaxial cable slot feed has an exposed coax conductor in a portion of the coaxial cable slot feed that bridges over the slot of the slot antenna and the dipole antenna.

16. A system as recited in claim 15, wherein the exposed coax conductor has a length that is less than a width of the dipole antenna.

17. A system as recited in claim 12, wherein the other one of the transmission antenna and the reception antenna is a dipole antenna.

18. A system as recited in claim 12, wherein the feed is a coaxial cable slot feed that connects the first and the second elements of the slot antenna.

19. A wireless device comprising:

a wireless communication system including a wireless transmission subsystem and a reception subsystem, each being configured to operate within a common frequency band and simultaneously; and

an antenna system including a pair of co-located complementary substantially orthogonal linearly polarized antennas, each of the subsystems being functionally coupled to only one of antennas of the pair, wherein;

one of the pair of antennas is a slot antenna having first and second elements, the other antenna being positioned at least partially within a slot of the slot antenna; and

the slot antenna is feed by a feed that connects the first and the second elements of the slot antenna and bridges over the slot and the other antenna therein.

20. A device as recited in claim 19, wherein the other antenna is a dipole antenna.

21. A device as recited in claim 19, wherein:

the other antenna is a dipole antenna; and

the dipole antenna is positioned completely within the slot of the slot antenna.

22. A device as recited in claim 19, wherein the antennas, when the subsystems operate within a common frequency band simultaneously, exhibit isolation of at least about 60 dB.

23. A device as recited in claim 19, wherein the slot of the slot antenna is disposed between the first and the second elements of the slot antenna.

24. A device as recited in claim 19, wherein the feed is a coaxial cable slot feed that connects the first and the second elements of the slot antenna.