Antenna system for communicating in plurality of frequency bands and electronic device including antenna system

Patent metadata

Field	Value
Publication number	US-2020021317-A1
Application number	US-201816483485-A
Country	US
Kind code	A1
Filing date	Jan 31, 2018
Priority date	Feb 8, 2017
Publication date	Jan 16, 2020
Grant date	—

Abstract

According to various embodiments of the present invention, an antenna system comprises: an antenna including a first radiator element operating in a first frequency band and a second radiator element operating in a second frequency band; a power supply part connected to the antenna; a first grounding part and a second grounding part; a matching circuit connected to the first grounding part; and a switch, wherein the switch can connect the first radiator element to the second grounding part and connect the second radiator element to the matching circuit when the antenna transmits or receives a signal through the first frequency band, and can connect the second radiator element to the second grounding part and connect the first radiator element to the matching circuit when the antenna transmits or receives the signal through the second frequency band.

First claim

1 . An antenna system comprising:
an antenna comprising a first radiator element operating in a first frequency band and a second radiator element operating in a second frequency band; a feeder unit connected to the antenna; a first ground unit; a second ground unit; a matching circuit connected to the first ground unit; and a switch, wherein the switch is configured to: connect the first radiator element with the second ground unit and connect the second radiator element with the matching circuit, when the antenna transmits or receives a signal through the first frequency band; and connect the second radiator element with the second ground unit and connect the first radiator element to the matching circuit, when the antenna transmits or receives a signal through the second frequency band.

2 . The antenna system of claim 1 , wherein the matching circuit includes at least one inductor, and
wherein an inductance of the inductor is set such that a voltage applied to the switch is a maximum allowable voltage or lower of the switch.

3 . The antenna system of claim 1 , wherein the switch includes a double pole, double throw (DPDT) switch, and
wherein the switch includes: a first port connected with the matching circuit; a second port connected with the second ground unit; a third port connected with the first radiator element; and a fourth port connected with the second radiator element.

4 . The antenna system of claim 3 , wherein the switch is configured to:
connect the first port with the fourth port and connect the second port with the third port, when the antenna transmits or receives a signal through the first frequency band.

5 . The antenna system of claim 3 , wherein the switch is configured to:
connect the first port with the third port and connect the second port with the fourth port, when the antenna transmits or receives a signal through the second frequency band.

6 . The antenna system of claim 1 , wherein the antenna further includes:
a third radiator element operating in a third frequency band, and wherein the switch includes a double pole, triple throw (DP3T) switch.

7 . The antenna system of claim 6 , wherein the switch includes:
a first port connected with the matching circuit; a second port connected with the second ground unit; a third port connected with the first radiator element; a fourth port connected with the second radiator element; and a fifth port connected with the third radiator element.

8 . The antenna system of claim 7 , wherein the switch is configured to:
connect the second port with the fifth port and connect the first port with the third port and the fourth port, when the antenna transmits or receives a signal through the third frequency band.

9 . The antenna system of claim 1 , wherein the switch includes:
a first single pole, double throw (SPDT) switch configured to connect the first radiator element with the second ground unit or the matching circuit; and a second SPDT switch configured to connect the second radiator element with the second ground unit or the matching circuit, wherein the first SPDT switch connects the first radiator element with the second ground unit when the antenna transmits or receives a signal through the first frequency band and connects the first radiator element with the matching circuit when the antenna transmits or receives a signal through the second frequency band, and wherein the second SPDT switch connects the second radiator element with the matching circuit when the antenna transmits or receives a signal through the first frequency band and connects the second radiator element with the second ground unit when the antenna transmits or receives a signal through the second frequency band.

10 . An electronic device comprising:
a housing: a printed circuit board disposed within the housing and including a ground region; and a wireless communication circuit disposed within the housing, wherein the printed circuit board includes: an antenna including a first radiator element operating in a first frequency band and a second radiator element operating in a second frequency band, wherein the first radiator element and the second radiator element; a first ground unit connected with the ground region; a second ground unit connected with the ground region; a matching circuit connected with the first ground unit; and a switch, and wherein the wireless communication circuit allows the switch to: connect the first radiator element with the second ground unit and connect the second radiator element with the matching circuit, when a signal is transmitted or received through the first frequency band; and connect the second radiator element with the second ground unit and connect the first radiator element with the matching circuit, when a signal is transmitted or received through the second frequency band.

11 . The electronic device of claim 10 , wherein the printed circuit board includes a slit region including a non-conductive material, and
wherein the switch and the matching circuit are disposed in the slit region.

12 . The electronic device of claim 10 , wherein the matching circuit includes at least one inductor, and
wherein an inductance of the inductor is set such that a voltage applied to the switch is a maximum allowable voltage or lower of the switch.

13 . The electronic device of claim 10 , wherein the switch includes:
a first port connected with the ground region through the matching circuit; a second port connected with the ground region; a third port connected with the first radiator element; and a fourth port connected with the second radiator element, and wherein the wireless communication circuit allows the switch to: connect the first port with the fourth port and connect the second port with the third port, when a signal is transmitted or received through the first frequency band; and connect the first port with the third port and connect the second port with the fourth port, when a signal is transmitted or received through the second frequency band.

14 . The electronic device of claim 10 , wherein the antenna further includes:
a third radiator element operating in a third frequency band, and wherein the wireless communication circuit allows the switch to: connect the first radiator element with the second ground unit and connect the second radiator element and the third radiator element with the matching circuit, when a signal is transmitted or received through the first frequency band; connect the second radiator element with the second ground unit and connect the first radiator element and the third radiator element with the matching circuit, when a signal is transmitted or received through the second frequency band; and connect the third radiator element with the second ground unit and connect the first radiator element and the second radiator element with the matching circuit, when a signal is transmitted or received through the third frequency band.

15 . The electronic device of claim 14 , wherein the switch includes:
a first port connected with the ground region through the matching circuit; a second port connected with the ground region; a third port connected with the first radiator element; a fourth port connected with the second radiator element; and a fourth port connected with the third radiator element, and wherein the wireless communication circuit allows the switch to: connect the first port with the fourth port and the fifth port and connect the second port with the third port, when a signal is transmitted or received

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Hyun Soo
• Na Hyo Seok

Classifications

• H01Q21/30

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

• H01Q9/14 Primary

  Length of element or elements adjustable (telescopic elements H01Q1/10) · CPC title

• H01Q1/38

  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 title

• H01Q5/335

  at the feed, e.g. for impedance matching · CPC title

• H04B1/006 Primary

  using switches for selecting the desired band (H04B1/0057 takes precedence) · CPC title