Three-dimensional antenna assembly and applications thereof

• US 8,922,446 B2
• Filed: 12/19/2012
• Issued: 12/30/2014
• Est. Priority Date: 04/11/2010
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Alexopoulos, Nicolaos G., Yoon, Seunghwan
• Primary Examiner(s): Nguyen, Hoang V
• Application Number:
  US13/720,686
• Publication Number:
  US 20130249760A1
• Time in Patent Office: 741 Days
• Field of Search: 343/816, 343/895
• US Class Current: 343/816
• CPC Class Codes: H01Q 21/0006 Particular feeding systems
• CPC Class Codes: H01Q 21/06 Arrays of individually energised antenna units similarly polarised and spaced apart
• CPC Class Codes: H01Q 21/20 the units being spaced along or adjacent to a curvilinear path slotted waveguide arrays H01Q21/005; circularly or helically slotted waveguides H01Q21/0062
• 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 9/27 Spiral antennas
• CPC Class Codes: H04B 1/44 Transmit/receive switching

Abstract

An antenna assembly includes a substrate, a plurality of spiral dipole antenna sections, and a phase array feeder. The substrate has a three-dimensional shaped region. Each of the spiral dipole antenna sections is supported by a corresponding section of the three-dimensional shaped region and conforms to the corresponding section of the three-dimensional shaped region such that, collectively, the plurality of spiral dipole antenna sections has an overall shape approximating a three-dimensional shape. The spiral dipole antenna sections are coupled together in accordance with a coupling configuration for beamforming and/or power combining. The phase array feeder inputs, or outputs, a phase offset representations of a radio frequency (RF) signal from, or to, the spiral dipole antenna sections and converts between the phase offset representations of the RF signal and the RF signal.

Claims

1. An antenna assembly comprises:

a substrate having a three-dimensional shaped region;

a plurality of spiral dipole antenna sections, wherein each spiral dipole antenna section of the plurality of spiral dipole antenna sections is supported by a corresponding section of the three-dimensional shaped region and conforms to the corresponding section of the three-dimensional shaped region such that, collectively, the plurality of spiral dipole antenna sections has an overall shape approximating a three-dimensional shape, wherein the plurality of spiral dipole antenna sections is coupled together in accordance with a coupling configuration; and

a phase array feeder operable to;

input, or output, a plurality of phase offset representations of a radio frequency (RF) signal from, or to, the plurality of spiral dipole antenna sections; and

convert between the plurality of phase offset representations of the RF signal and the RF signal.

2. The antenna assembly of claim 1, wherein the phase array feeder is further operable to:

determine a beamform angle for receiving an inbound RF signal or transmitting an outbound RF signal, wherein the RF signal corresponds to the inbound RF signal or the outbound RF signal; and

establish the plurality of phase offset representations of the RF signal in accordance with the beamform angle.

3. The antenna assembly of claim 1 further comprises:

each spiral dipole antenna section of the plurality of spiral dipole antenna sections including a non-inverting spiral coil, an inverting spiral coil, and a dipole feed point proximal to an inner winding of the non-inverting and inverting spiral coils; and

the coupling configuration including coupling the non-inverting spiral coils and the inverting spiral coils of the plurality of spiral dipole antenna sections such that the plurality of spiral dipole antenna sections function as transformer baluns and antennas for the antenna assembly.

4. The antenna assembly of claim 3, wherein the coupling configuration further comprises:

coupling respective ones of the plurality of phase offset representations of the RF signal to the dipole feed points of the plurality of spiral dipole antenna sections; and

coupling ends of the non-inverting spiral coils of ones of the plurality of spiral dipole antenna sections to ends of the inverting spiral coils of other ones of the plurality of spiral dipole antenna sections.

5. The antenna assembly of claim 1 further comprises:

each spiral dipole antenna section of the plurality of spiral dipole antenna sections including a non-inverting spiral coil, an inverting spiral coil, and a dipole feed point proximal to an inner winding of the non-inverting and inverting spiral coils; and

the coupling configuration including;

coupling a short across the dipole feed point of each of the plurality of spiral dipole antenna sections; and

coupling, for each of the plurality of phased offset representations of the RF signal, a non-inverting leg of the phase offset representation to an end of the non-inverting spiral coil of one of the plurality of spiral dipole antenna sections and coupling an inverting leg of the phase offset representation to an end of the inverting spiral coil of another one of the plurality of spiral dipole antenna sections.

6. The antenna assembly of claim 1, wherein a spiral dipole antenna section of the plurality of spiral dipole antenna sections comprises:

a non-inverting spiral coil;

an inverting spiral coil; and

a dipole feed point proximal to an inner winding of the non-inverting and inverting spiral coils, wherein each of the non-inverting spiral coil and the inverting spiral coil has an Archimedean symmetric spiral shape, an Archimedean eccentric spiral shape, an equiangular symmetric spiral shape, or an equiangular eccentric spiral shape.

7. The antenna assembly of claim 6, wherein each of the non-inverting spiral coil and the inverting spiral coil comprises one of:

a substantially solid conducive material with a multiple turn spiral slot separating the non-inverting spiral coil from the inverting spiral coil; and

a conductive wire formed as a multiple turn spiral, wherein a lower end of a frequency band of antenna assembly is based on a radius of the plurality of dipole spiral antenna sections.

8. The antenna assembly of claim 1, wherein the substrate comprises one of:

one or more printed circuit boards;

one or more integrated circuit package substrates; and

an non-conductive fabricated antenna backing structure, wherein the three-dimensional shaped region includes one of;

a cup shape;

a conical shape;

a cylindrical shape;

a pyramid shape;

a box shape;

a spherical shape;

a parabolic shape; and

a hyperbolic shape.

9. An antenna assembly comprises:

a three-dimensional feed assembly that includes;

a substrate having a three-dimensional shaped region;

a plurality of spiral dipole antenna sections, wherein each spiral dipole antenna section of the plurality of spiral dipole antenna sections is supported by a corresponding section of the three-dimensional shaped region and conforms to the corresponding section of the three-dimensional shaped region such that, collectively, the plurality of spiral dipole antenna sections has an overall shape approximating a three-dimensional shape, wherein the plurality of spiral dipole antenna sections is coupled together in accordance with a coupling configuration; and

a phase array feeder operable to;

convert a plurality of phase offset representations of an inbound radio frequency (RF) signal received from the plurality of spiral dipole antenna sections into a received RF signal; and

convert an outbound RF signal into a plurality of phase offset representations of the outbound RF signal and output the plurality of phase offset representations of the outbound RF signal to the plurality of spiral dipole antenna sections; and

a three dimensional reflector operable to;

reflect the inbound RF signal to the plurality of spiral dipole antenna sections, wherein the plurality of spiral dipole antenna sections generates the plurality of phase offset representations of the inbound RF signal from the reflected inbound RF signal; and

reflect the plurality of phase offset representations of the outbound RF signal.

10. The antenna assembly of claim 9, wherein the phase array feeder is further operable to:

determine a beamform angle for receiving the inbound RF signal or transmitting the outbound RF signal; and

establish the plurality of phased offset representations of the inbound or outbound RF signal in accordance with the beamform angle.

11. The antenna assembly of claim 9 further comprises:

each spiral dipole antenna section of the plurality of spiral dipole antenna sections including a non-inverting spiral coil, an inverting spiral coil, and a dipole feed point proximal to an inner winding of the non-inverting and inverting spiral coils; and

the coupling configuration including;

coupling respective ones of the plurality of phase offset representations of the inbound or outbound RF signal to the dipole feed points of the plurality of spiral dipole antenna sections; and

coupling ends of the non-inverting spiral coils of ones of the plurality of spiral dipole antenna sections to ends of the inverting spiral coils of other ones of the plurality of spiral dipole antenna sections.

12. The antenna assembly of claim 9 further comprises:

each spiral dipole antenna section of the plurality of spiral dipole antenna sections including a non-inverting spiral coil, an inverting spiral coil, and a dipole feed point proximal to an inner winding of the non-inverting and inverting spiral coils; and

the coupling configuration including;

coupling a short across the dipole feed point of each of the plurality of spiral dipole antenna sections; and

coupling, for each of the plurality of phased offset representations of the inbound or outbound RF signal, a non-inverting leg of the phase offset representation to an end of the non-inverting spiral coil of one of the plurality of spiral dipole antenna sections and coupling an inverting leg of the phase offset representation to an end of the inverting spiral coil of another one of the plurality of spiral dipole antenna sections.

13. The antenna assembly of claim 9, wherein a spiral dipole antenna section of the plurality of spiral dipole antenna sections comprises:

a non-inverting spiral coil;

an inverting spiral coil; and

a dipole feed point proximal to an inner winding of the non-inverting and inverting spiral coils, wherein each of the non-inverting spiral coil and the inverting spiral coil has an Archimedean symmetric spiral shape, an Archimedean eccentric spiral shape, an equiangular symmetric spiral shape, or an equiangular eccentric spiral shape, and wherein each of the non-inverting spiral coil and the inverting spiral coil includes one of;

a substantially solid conducive material with a multiple turn spiral slot separating the non-inverting spiral coil from the inverting spiral coil; and

a conductive wire formed as a multiple turn spiral, wherein a lower end of a frequency band of antenna assembly is based on a radius of the plurality of dipole spiral antenna sections.

14. The antenna assembly of claim 9, wherein the substrate comprises one of:

one or more printed circuit boards;

one or more integrated circuit package substrates; and

an non-conductive fabricated antenna backing structure, wherein the three-dimensional shaped region includes one of;

a cup shape;

a conical shape;

a cylindrical shape;

a pyramid shape;

a box shape;

a spherical shape;

a parabolic shape; and

a hyperbolic shape.

15. The antenna assembly of claim 9, wherein the three-dimensional feed assembly comprises one of:

a hyperbolic feed circuit; and

a hyperbolic reflector that reflects the inbound RF signal to a feed circuit or reflects the outbound RF signal from the feed circuit.

16. A radio frequency (RF) front-end module comprises:

an antenna assembly that includes;

a substrate having a three-dimensional shaped region;

a plurality of spiral dipole antenna sections, wherein each spiral dipole antenna section of the plurality of spiral dipole antenna sections is supported by a corresponding section of the three-dimensional shaped region and conforms to the corresponding section of the three-dimensional shaped region such that, collectively, the plurality of spiral dipole antenna sections has an overall shape approximating a three-dimensional shape, wherein the plurality of spiral dipole antenna sections is coupled together in accordance with a coupling configuration; and

a phase array feeder operable to;

convert a plurality of phase offset representations of an inbound radio frequency (RF) signal received from the plurality of spiral dipole antenna sections into a received RF signal; and

convert an outbound RF signal into a plurality of phase offset representations of the outbound RF signal and output the plurality of phase offset representations of the outbound RF signal to the plurality of spiral dipole antenna sections; and

a receive-transmit isolation module operably coupled to the antenna assembly, wherein the receive-transmit isolation module is operable to isolate the inbound RF signal and the outbound RF signal; and

a tuning module operable to tune the receive-transmit isolation module.

17. The RF front-end module of claim 16, wherein the antenna assembly further comprises:

a three dimensional reflector operable to;

reflect the inbound RF signal to the plurality of spiral dipole antenna sections, wherein the plurality of spiral dipole antenna sections generates the plurality of phase offset representations of the inbound RF signal from the reflected inbound RF signal; and

reflect the plurality of phase offset representations of the outbound RF signal.

18. The RF front-end module of claim 16, wherein the phase array feeder is further operable to:

determine a beamform angle for receiving the inbound RF signal or transmitting the outbound RF signal; and

establish the plurality of phased offset representations of the inbound or outbound RF signal in accordance with the beamform angle.

19. The RF front-end module of claim 16 further comprises:

each spiral dipole antenna section of the plurality of spiral dipole antenna sections including a non-inverting spiral coil, an inverting spiral coil, and a dipole feed point proximal to an inner winding of the non-inverting and inverting spiral coils; and

the coupling configuration including;

coupling respective ones of the plurality of phase offset representations of the inbound or outbound RF signal to the dipole feed points of the plurality of spiral dipole antenna sections; and

coupling ends of the non-inverting spiral coils of ones of the plurality of spiral dipole antenna sections to ends of the inverting spiral coils of other ones of the plurality of spiral dipole antenna sections.

20. The RF front-end module of claim 16 further comprises:

each spiral dipole antenna section of the plurality of spiral dipole antenna sections including a non-inverting spiral coil, an inverting spiral coil, and a dipole feed point proximal to an inner winding of the non-inverting and inverting spiral coils; and

the coupling configuration including;

coupling a short across the dipole feed point of each of the plurality of spiral dipole antenna sections; and

coupling, for each of the plurality of phased offset representations of the inbound or outbound RF signal, a non-inverting leg of the phase offset representation to an end of the non-inverting spiral coil of one of the plurality of spiral dipole antenna sections and coupling an inverting leg of the phase offset representation to an end of the inverting spiral coil of another one of the plurality of spiral dipole antenna sections.