Two port antennas with separate antenna branches including respective filters
AssigneesSony Corporation, Sony Mobile Communications Inc.
InventorScott LaDell Vance
Life of this patent
Estimating the term…
Abstract
A communication structure may include a mobile terminal ground plane including a ground point. A primary radiator is electrically coupled to the ground point. A first antenna branch includes a first filter circuit that is coupled between a first point on the primary radiator and a first antenna port and that corresponds to a first frequency band. A second antenna branch includes a second filter circuit that is coupled between a second point on the primary radiator and a second antenna port that corresponds to a second frequency band that is different from the first frequency band. In addition, a radio frequency (RF) transmitter and/or receiver may be provided with the ground plane and the primary radiator being electrically coupled to the RF transmitter and/or receiver.
Claims18
A communication structure, comprising:
- a mobile terminal ground plane including a ground point;
- a primary radiator that is electrically coupled to the ground point;
- a first antenna branch that includes a first filter circuit that is coupled between a first point on the primary radiator and a first antenna port and that corresponds to a first frequency band;
- and
- a second antenna branch that includes a second filter circuit that is coupled between a second point on the primary radiator and a second antenna port that corresponds to a second frequency band that is different from the first frequency band,
- wherein the primary radiator comprises a length of about 30 mm and is arranged at a distance in a range of about 2 mm to about 4 mm from the ground plane,
- wherein the first point on the primary radiator is located at a position along the primary radiator to provide an impedance match, and
- wherein the second antenna branch is located at a position along the primary radiator that is in a range of about ⅓ of a distance from the first point on the primary radiator to an end of the primary radiator to about ½ of the distance from the first point on the primary radiator to the end of the primary radiator.
A communication structure, comprising:
- a mobile terminal ground plane including a ground point;
- primary radiator that is electrically coupled to the ground point;
- a first antenna branch that includes a first filter circuit that is coupled between a first point on the primary radiator and a first antenna port and that corresponds to a first frequency band;
- and
- a second antenna branch that includes a second filter circuit that is coupled between a second point on the primary radiator and a second antenna port that corresponds to a second frequency band that is different from the first frequency band, wherein the first filter circuit comprises:
- a first capacitor that is coupled between the first point on the primary radiator and the first antenna port;
- a first inductor that includes a first terminal that is coupled to the first point on the primary radiator;
- and
- a second capacitor that includes a first terminal that is coupled to a second terminal of the first inductor and a second terminal that is coupled to the first antenna port, and
- wherein the second filter circuit comprises:
- a second inductor that is coupled between the second point on the primary radiator and the second antenna port;
- a third capacitor that includes a first terminal that is coupled to the second point on the primary radiator;
- and
- a third inductor that includes a first terminal that is coupled to a second terminal of the third capacitor and a second terminal that is coupled to the second antenna port.
A communication structure, comprising:
- a mobile terminal ground plane including a ground point;
- a primary radiator that is electrically coupled to the ground point;
- a first antenna branch that includes a first filter circuit that is coupled between a first point on the primary radiator and a first antenna port and that corresponds to a first frequency band;
- and
- a second antenna branch that includes a second filter circuit that is coupled between a second point on the primary radiator and a second antenna port that corresponds to a second frequency band that is different from the first frequency band,
- wherein the first antenna branch, a first portion of the primary radiator that is between the first point on the primary radiator and the second point on the primary radiator, and a second portion of the primary radiator that is beyond the second point on the primary radiator are collectively operative to resonate at a frequency in the first frequency band, and
- wherein the second antenna branch and the second portion of the primary radiator are collectively operative to resonate at a frequency in the second frequency band.
Dependencies are inferred from the claim text.