Transponder stabilization

• US 10,847,899 B2
• Filed: 01/24/2018
• Issued: 11/24/2020
• Est. Priority Date: 01/25/2017
• Status: Active Grant

• Current Assignee: Norbit ITS Co.
• Original Assignee: Norbit Its
• Inventors: Kirknes, Steffen
• Primary Examiner(s): Crawford, Jason
• Application Number:
  US16/479,318
• Publication Number:
  US 20190356059A1
• Time in Patent Office: 1,035 Days
• CPC Class Codes: H01P 5/227 90° branch line couplers
• CPC Class Codes: H01Q 1/2225 used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
• 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 1/521 reducing the coupling between adjacent antennas
• CPC Class Codes: H01Q 21/24 Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001
• CPC Class Codes: H01Q 3/46 Active lenses or reflecting arrays
• CPC Class Codes: H01Q 9/0407 Substantially flat resonant element parallel to ground plane, e.g. patch antenna dipole H01Q9/285; monopole H01Q9/40
• CPC Class Codes: H03F 1/32 Modifications of amplifiers to reduce non-linear distortion by negative feedback H03F1/34
• CPC Class Codes: H03F 1/34 Negative-feedback-circuit arrangements with or without positive feedback H03F1/02 - H03F1/30, H03F1/38 - H03F1/50, H03F3/50 take precedence ; for rejection of common mode signals H03F3/45479
• CPC Class Codes: H03F 3/608 Reflection amplifiers, i.e. amplifiers using a one-port amplifying element and a multiport coupler H03F7/00 takes precedence
• CPC Class Codes: H04B 1/04 Circuits

Abstract

Present invention is an antenna system and a wireless device comprising a negative resistance amplifier, the antenna system further comprises a first antenna element, said first antenna element being adapted to receive an incident wave for generating a first signal proportional to the incident wave, wherein the antenna system comprises a signal generating device for generating a second signal that is essentially 90 degrees phase shifted to the first signal, the first signal and the second signal being adapted to be applied to a hybrid coupler such that the first signal and the second signal are adapted to essentially destructively combine at a first hybrid coupler port, and the first signal and the second signal are adapted to be essentially constructively combined at a second hybrid coupler port, the second hybrid coupler port being adapted to operatively connect to the negative resistance amplifier, and the first hybrid coupler port being adapted to connect to a termination unit. Please invention is also a method for reflection of an incident wave.

Claims

1. An antenna system comprising:

a negative resistance amplifier;

a first antenna element, said first antenna element being configured to receive an incident wave for generating a first signal proportional to the incident wave;

a signal generating device for generating a second signal that is essentially 90 degrees phase shifted to the first signal, the first signal and the second signal being configured to be applied to a hybrid coupler such that the first signal and the second signal are configured to essentially destructively combine to a first output signal at a first hybrid coupler port;

wherein the first signal and the second signal are configured to be essentially constructively combined to a second output signal at a second hybrid coupler port; and

wherein the second hybrid coupler port is configured to operatively connect to the negative resistance amplifier for amplifying the second output signal, and the first hybrid coupler port being configured to connect to a termination unit for at least substantially absorbing the first output signal.

2. The antenna system according to claim 1, wherein the signal generating device is a second antenna element arranged to receive the incident wave at essentially 90 degrees difference with respect to the first antenna element.

3. The antenna system according to claim 2, wherein the first antenna element and the second antenna element are arranged in the form of an orthogonal type antenna or an orthogonally fed circular antenna.

4. The antenna system according to claim 2, comprising a computational unit configured to compare a difference in amplitude between the first input signal and the second input signal to generate an error signal, the error signal being used by the computational unit for calculating or calibrating a position of the antenna arrangement.

5. The antenna system according to claim 1, wherein the negative resistance amplifier is further configured to output an amplified signal at the second hybrid coupler port, the amplified signal being an amplified second output signal.

6. A wireless device comprising the antenna system according to claim 1.

7. A method for reflection of an incident wave, the method comprising:

generating a first input signal at a third port of a hybrid coupler by receiving the incident wave using a first antenna;

generating a second input signal at a fourth port of the hybrid coupler, the second signal being essentially 90 degrees shifted with respect to the first signal;

inputting the first input signal and the second input signal to the hybrid coupler thereby generating a first output signal at a first port of the hybrid coupler, said first output signal being a destructive combination of the first input signal and the second input signal; and

generating a second output signal at a second port of the hybrid coupler, said second output signal being a constructive combination of the first input signal and the second input signal;

absorbing at least substantially the first output signal using a termination unit connected at the first output port;

amplifying the second output signal using the negative resistance amplifier for generating an amplified signal, and then feeding the amplified signal to the second port of the hybrid for generating a first transmitted signal at the third port of the hybrid;

reflecting a first reflected wave proportional to the first transmitted signal using the first antenna element; and

receiving any non-desired signals, generated due to non-idealities such as mismatch, at the first port and absorbing at least substantially said non-desired signals using the termination unit.

8. The method according to claim 7, wherein the second signal is generated by a second antenna element, and the method also comprises the steps:

generating a second transmitted signal at the fourth port of the hybrid relative to the amplified signal;

reflecting a second reflected wave proportional to the second transmitted signal using the second antenna element, said second reflected wave being essentially 90 degrees phase shifted relative to the first reflected wave.