Multiband on ground antenna with a dual radiator arrangement

Patent metadata

Field	Value
Publication number	US-9374126-B2
Application number	US-201314092179-A
Country	US
Kind code	B2
Filing date	Nov 27, 2013
Priority date	Nov 27, 2013
Publication date	Jun 21, 2016
Grant date	Jun 21, 2016

Abstract

An antenna arrangement includes a switch having an open state and a closed state, a first antenna that operates as a first active driven element in a first frequency band in response to the switch being in the open state, and a second antenna that operates as a second active driven element in a first frequency band in response to the switch being in the open state. The closed state configures the first antenna and the second antenna to operate in a second frequency band different from the first frequency band by operatively coupling a first impedance between the first antenna and a radio frequency ground, and by operatively coupling a second impedance between the second antenna and the radio frequency ground. The first antenna functions as a parasitic element in the second frequency band and the second antenna functions as an active driven element in the second frequency band.

First claim

What is claimed is:

1. A method comprising:
providing a first antenna and a second antenna both configured for operating as active driven antenna elements in a first frequency band; and
configuring the first antenna and the second antenna to operate in a second frequency band different from the first frequency band,
wherein the configuring comprises:
operatively coupling a first impedance between the first antenna and a radio frequency ground, and
operatively coupling a second impedance between the second antenna and the radio frequency ground,

wherein selectively adding the first and second impedances to a circuit shifts the operating bandwidth of the first and second antennas from a first frequency band to a second frequency band; and
wherein the first and second impedances are selectively added using radio frequency switches to switch the first and second impedances in and out of the circuit.

2. The method of claim 1 wherein the first frequency band is in a lower frequency range than the second frequency band.

3. The method of claim 1 wherein the first impedance comprises an inductance in parallel with a capacitance.

4. The method of claim 1 wherein the first antenna is configured to function as a parasitic antenna element in the second frequency band in response to the second antenna being configured to function as an active driven antenna element in the second frequency band, the first antenna being electromagnetically coupled to the second antenna, and the first antenna being coupled to a ground plane.

5. The method of claim 1 further comprising providing at least one switch having an open state and a closed state, the closed state connecting the first impedance between the first antenna and the radio frequency ground, and the closed state connecting the second impedance between the second antenna and the radio frequency ground.

6. The method of claim 5 further comprising the at least one switch responding to a first control signal by changing from the open state to the closed state, and responding to a second control signal by changing from the closed state to the open state.

7. The method of claim 6 further comprising generating the first control signal in response to operating in the second frequency band, and generating the second control signal in response to operating in the first frequency band.

8. The method of claim 1 further comprising configuring both the first antenna and the second antenna as active antenna elements for the first frequency band.

9. The method of claim 1 , executed in a portable electronic device.

10. An apparatus comprising:
at least one switch having an open state and a closed state;
a first antenna configured for operating as a first active driven antenna element in a first frequency band in response to the at least one switch being in the open state;
a second antenna configured for operating as a second active driven antenna element in the first frequency band in response to the at least one switch being in the open state;
wherein the closed state configures the first antenna and the second antenna to operate in a second frequency band different from the first frequency band,
wherein the configuring comprises:
operatively coupling a first impedance between the first antenna and a radio frequency ground, and
operatively coupling a second impedance between the second antenna and the radio frequency ground,

wherein selectively adding the first and second impedances to a circuit shifts the operating bandwidth of the first and second antennas from a first frequency band to a second frequency band; and
wherein the first and second impedances are selectively added using radio frequency switches to switch the first and second impedances in and out of the circuit.

11. The apparatus of claim 10 wherein the first frequency band is in a lower frequency range than the second frequency band.

12. The apparatus of claim 10 wherein the first impedance comprises an inductance in parallel with a capacitance.

13. The apparatus of claim 10 wherein the first antenna is configured to function as a parasitic antenna element in the second frequency band in response to the second antenna being configured to function as an active driven antenna element in the second frequency band, the first antenna being electromagnetically coupled to the second antenna, and the first antenna being coupled to a ground plane.

14. The apparatus of claim 10 wherein the at least one switch includes a control signal input that responds to a first control signal by changing from the open state to the closed state, and that responds to a second control signal by changing from the closed state to the open state.

15. The apparatus of claim 14 further comprising a processor, configured to be operatively coupled to the at least one switch, for generating the first control signal and for generating the second control signal.

16. The apparatus of claim 15 further comprising:
a radio frequency transceiver configured to be operatively coupled to the first antenna and the second antenna, and
a non-transitory computer readable memory configured to be operatively coupled to the processor, the memory storing a set of computer executable instructions which, upon execution, perform at least the following:
generating the first control signal in response to the radio frequency transceiver operating in the second frequency band, and
generating the second control signal in response to the radio frequency transceiver operating in the first frequency band.

17. The apparatus of claim 10 further comprising an input/output interface configured for accepting a radio frequency input signal and for providing a radio frequency output signal.

18. The apparatus of claim 17 further comprising a diplexer operatively coupled between the input/output interface, and both of the first antenna and the second antenna.

19. A portable electronic device comprising the apparatus according to claim 10 .

20. The apparatus of claim 10 , wherein the apparatus is a portable electronic device further comprising:
user interface circuitry and user interface software configured to facilitate user control of at least some functions of the portable electronic device through use of a display and configured to respond to user input; and
a display and display circuitry configured to display at least a portion of a user interface of the portable electronic device, the display and display circuitry configured to facilitate user control of at least some functions of the portable electronic device.

21. A circuit arrangement comprising:
at least one switch having an open state and a closed state;
a first antenna configured for operating as a first active driven antenna element in a first frequency band in response to the at least one switch being in the open state;
a second antenna configured for operating as a second active driven antenna element in the first frequency band in response to the at least one switch being in the open state;
wherein the closed state configures the first antenna and the second antenna to operate in a second frequency band different from the first frequency band,
wherein the configuring comprises:
operatively coupling a first impedance between the first antenna and a radio frequency ground, and
operatively coupling a second impedance between the second antenna and the radio frequency ground,

wherein selectively adding the first and second impedances to the circuit arrangement shifts the

Assignees

• Nokia Corp
• Nokia Technologies Oy

Inventors

• Larsen Niels Bonne
• Erentok Aycan
• Kupari Marko Olavi

Classifications

• H01Q21/30

  Combinations of separate antenna units operating in different wavebands and connected to a common feeder system · CPC title

• H01Q5/328

  between a radiating element and ground · CPC title

• H01Q5/321 Primary

  within a radiating element or between connected radiating elements · CPC title

• H01Q5/378

  Combination of fed elements with parasitic elements · CPC title

• H01Q9/0421

  with a shorting wall or a shorting pin at one end of the element (H01Q9/0414 takes precedence) · CPC title