Concentrated wireless device providing operability in multiple frequency regions

Patent metadata

Field	Value
Publication number	US-9379443-B2
Application number	US-201313803100-A
Country	US
Kind code	B2
Filing date	Mar 14, 2013
Priority date	Jul 16, 2012
Publication date	Jun 28, 2016
Grant date	Jun 28, 2016

Abstract

A radiating system for transmitting and receiving signals in first and second frequency regions includes a radiating structure, a radiofrequency system, and an external port. The radiating structure has first and second isolated radiation boosters coupled to a ground plane layer. A first internal port of the radiating structure is between the first radiation booster and the ground plane layer, and a second internal port is between the second radiation booster and the ground plane layer. A distance between the two internal ports is less than 0.06 times a wavelength of the lowest frequency. The maximum size of the first and second radiation boosters is smaller than 1/30 times the wavelength of the lowest frequency. The radiofrequency system includes two ports connected respectively to the first and the second internal ports of the radiating structure, and a port connected to the external port of the radiating system.

First claim

What is claimed is:

1. An apparatus comprising:
a radiating system configured to transmit and receive electromagnetic wave signals in a first frequency region and in a second frequency region, wherein a highest frequency of the first frequency region is lower than a lowest frequency of the second frequency region, the radiating system comprising:
a radiating structure comprising:
a first radiation booster with a connection point;
a second radiation booster with a connection point, wherein a maximum size of the first and second radiation boosters is smaller than 1/30 times the wavelength of the lowest frequency of the first frequency region;
a ground plane layer configured to support at least two radiation modes and comprising first and second connection points, the first and second radiation boosters being configured to couple electromagnetic energy to and from the ground plane layer;
a first internal port defined between the connection point of the first radiation booster and the first connection point of the ground plane layer; and
a second internal port defined between the connection point of the second radiation booster and the second connection point of the ground plane layer, wherein a distance between the first internal port and the second internal port is less than 0.06 times a wavelength of the lowest frequency of the first frequency region, and;

at least one external port; and
a radiofrequency system comprising: first and second ports connected respectively to the first and the second internal ports of the radiating structure; a port connected to the at least one external port of the radiating system; at least one filtering circuit; and at least two matching networks, wherein the at least one filtering circuit is disposed between at least one of the first and second radiation boosters and at least one of the at least two matching networks and is configured to isolate the first radiation booster from the second radiation booster.

2. The apparatus of claim 1 , wherein an input impedance of the radiating structure at the first internal port when disconnected from the radiofrequency system has an imaginary part not equal to zero for any frequency of the first frequency region.

3. The apparatus of claim 2 , wherein an input impedance of the radiating structure at the second internal port when disconnected from the radiofrequency system has an imaginary part not equal to zero for any frequency of the second frequency region.

4. The apparatus of claim 3 , wherein the maximum size of the first and second radiation boosters is smaller than 1/30 times a wavelength of the lowest frequency of the second frequency region.

5. The apparatus of claim 3 , wherein the first and second radiation boosters completely protrude from the ground plane layer.

6. The apparatus of claim 3 , wherein one of the first and second radiation boosters is arranged on a cut-off portion of the ground plane layer.

7. The apparatus of claim 3 , wherein the at least one filtering circuit connected to the second internal port of the radiating structure provides an impedance having a modulus larger than 150 ohms in the first frequency region.

8. The apparatus of claim 3 , wherein the at least one filtering circuit connected to the first internal port of the radiating structure provides an impedance having a modulus larger than 150 ohms in the second frequency region.

9. The apparatus of claim 3 , wherein the first radiation booster and the second radiation booster have polyhedral shapes.

10. The apparatus of claim 3 , wherein the first and second radiation boosters are located substantially close to the shortest side of the ground plane layer.

11. An apparatus comprising:
a radiating system configured to transmit and receive electromagnetic wave signals in first and second frequency regions, wherein the highest frequency of the first frequency region is lower than the lowest frequency of the second frequency region, the radiating system comprising:
a radiating structure comprising: a ground plane layer having a first connection point; and a radiation booster comprising a connection point and configured to couple electromagnetic energy to and from the ground plane layer, the ground plane layer being configured to support at least two radiation modes, wherein an internal port of the radiating structure is defined between the connection point of the radiation booster and the first connection point of the ground plane layer, and a maximum size of the radiation booster is smaller than 1/30 times a wavelength of the lowest frequency of the first frequency region;
at least one external port; and
a radiofrequency system comprising: a first port connected to the internal port of the radiating structure; a second port connected to the at least one external port of the radiating system; an impedance equalizer; a filtering circuit; and a matching network;
wherein the impedance equalizer is configured to transform an impedance at the internal port of the radiating structure into an impedance having an imaginary part substantially equal to zero at a frequency larger than the highest frequency of the first frequency region and lower than the lowest frequency of the second frequency region; and
wherein the filtering circuit is disposed between and radiation booster and the matching network.

12. The apparatus of claim 11 , wherein the input impedance of the radiating structure at the internal port when disconnected from the radiofrequency system has an imaginary part not equal to zero for any frequency of the first and second frequency regions.

13. The apparatus of claim 12 , wherein the radiofrequency system further comprises a second matching network.

14. The apparatus of claim 13 , wherein the radio frequency system further comprises a combiner to combine the electrical wave signals of the first and second frequency regions.

15. The apparatus of claim 12 , wherein the matching network further comprises a broadband matching circuit.

16. The apparatus of claim 12 , wherein the radiation booster is located substantially close to a corner of the ground plane layer.

17. The apparatus of claim 16 , wherein the radiation booster completely protrude from the ground plane layer.

18. The apparatus of claim 12 , wherein the radiation booster has a polyhedral shape.

19. The apparatus of claim 17 , wherein the radiation booster has six faces.

20. The apparatus of claim 12 , wherein an imaginary part of the input impedance after the impedance equalizer within the first frequency region is substantially the complex conjugate of the imaginary part of the input impedance within the second frequency region.

Assignees

• Fractus Sa
• Fractus Antennas Sl

Inventors

• Anguera Pros Jaume
• Picher Planellas Cristina
• Andujar Linares Aurora
• Puente Baliarda Carles

Classifications

• H01Q9/04 Primary

  Resonant antennas · CPC title

• H01Q1/48

  Earthing means; Earth screens; Counterpoises · CPC title

• H01Q1/243 Primary

  with built-in antennas · CPC title

• H01Q1/24

  with receiving set · CPC title

• H01Q9/0414

  in a stacked or folded configuration · CPC title