Wideband frequency shift modulation using transient state of antenna

• US 9,705,714 B2
• Filed: 03/31/2016
• Issued: 07/11/2017
• Est. Priority Date: 11/20/2013
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Suh, Seong-Youp, Sajuyigbe, Adesoji J., Manteghi, Majid, Mohsen, Salehi, Skinner, Harry G.
• Primary Examiner(s): FILE, ERIN M
• Application Number:
  US15/086,058
• Publication Number:
  US 20170026210A1
• Time in Patent Office: 467 Days
• Field of Search: None
• CPC Class Codes: H01Q 3/34 by electrical means active lenses or reflecting arrays H01Q3/46
• CPC Class Codes: H01Q 3/44 varying the electric or magnetic characteristics of reflecting, refracting, or diffracting devices associated with the radiating element
• CPC Class Codes: H01Q 5/00 Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements combinations of separate active antenna units operating in different wavebands and connected to a common feeder system H01Q21/30
• CPC Class Codes: H01Q 5/25 Ultra-wideband [UWB] systems, e.g. multiple resonance systems; Pulse systems
• CPC Class Codes: H01Q 9/0421 with a shorting wall or a shorting pin at one end of the element H01Q9/0414 takes precedence
• CPC Class Codes: H04B 1/006 using switches for selecting the desired band H04B1/0057 takes precedence
• CPC Class Codes: H04B 1/04 Circuits
• CPC Class Codes: H04L 27/12 Modulator circuits; Transmitter circuits

Abstract

Described herein are architectures, platforms and methods for implementing modulating a radiating signal of a high Q antenna in order to transmit from one frequency to one or more different frequencies which may be in the same narrow band frequency spectrum or in a wide band frequency spectrum.

Claims

1. A method of transmitting a wideband signal from a high Q antenna comprising:

transmitting at a first frequency from the high Q antenna;

shifting a resonant frequency of the high Q antenna;

modulating a radiating signal when shifting the resonant frequency;

switching the high Q antenna to a second frequency, wherein the switching is synchronized with a zero-crossing time of an incident signal to preserve a stored energy during the switching; and

switching to subsequent frequencies.

2. The method of claim 1, wherein the first frequency is in a narrow band frequency spectrum of the high Q antenna.

3. The method of claim 1, wherein the first frequency is in a wideband frequency spectrum that is not of the high Q antenna.

4. The method of claim 1, wherein the second frequency is in a narrow band frequency spectrum of the high Q antenna.

5. The method of claim 1, wherein the second frequency is in a wideband frequency spectrum that is not of the high Q antenna.

6. The method of claim 1, wherein the modulating the radiating signal is performed by using frequency shifts of the high Q antenna.

7. The method of claim 1, wherein the modulating is frequency shift keying modulation.

8. The method of claim 1, wherein the preserved stored energy is dissipated in a resistive load after the switching of the high Q antenna to the second frequency.

9. The method of claim 1, wherein the switching the high Q antenna is at switching frequency to allow the radiating signal to be transmitted independent of impedance bandwidth of the antenna.

10. The method of claim 1, wherein a single RF source is used to excite the first, second and other carrier frequencies.

11. A device comprising:

a tunable high Q antenna configured to transmit in a narrow band frequency spectrum;

a single RF source configured to power the tunable high Q antenna; and

a modulating signal source that comprises a high Q resonator responsive to a frequency shift of the tunable high Q antenna, wherein the modulating signal source is configured to switch the tunable high Q antenna to a frequency in a wide band frequency spectrum, wherein the switching is synchronized with a zero-crossing time of an incident signal to preserve and not disturb a stored energy during the switching.

12. The device of claim 11, wherein the tunable high Q antenna is configured to respond to a required time variation.

13. The device of claim 11, wherein stored energy around the tunable high Q antenna is configured to shift a transmitted frequency of the tunable high Q antenna.

14. The device of claim 11, wherein the modulating signal source comprises a time variant inductor for frequency modulation.

15. The device of claim 11, wherein the modulating signal source comprises a time variant capacitor for frequency modulation.

16. The device of claim 11, wherein the modulating signal source comprises switching capacitors controlled by a binary data signal.

17. A device comprising:

a tunable antenna configured to transmit in a first band frequency spectrum;

an RF source configured to feed the tunable antenna; and

a modulating signal source that comprises a high Q resonator responsive to a frequency shift of the tunable antenna, wherein the modulating signal source is configured to switch the tunable antenna to a frequency in a second band frequency spectrum, wherein the switching is synchronized with a zero-crossing time of an incident signal to preserve and not disturb a stored energy during the switching.

18. The device of claim 17, wherein the tunable antenna is narrowband high Q antenna.

19. The device of claim 17, wherein the modulating signal source comprises switching capacitors that store the stored energy during the switching of the tunable antenna to the frequency in the second band frequency spectrum.