LTE full-band cellphone antenna structure

Patent metadata

Field	Value
Publication number	US-10236558-B2
Application number	US-201715416913-A
Country	US
Kind code	B2
Filing date	Jan 26, 2017
Priority date	May 3, 2016
Publication date	Mar 19, 2019
Grant date	Mar 19, 2019

Abstract

Provided is an LTE full-band cellphone antenna structure, including a ground plate, a circuit board having a feeding point, a feeding terminal matching circuit provided on the circuit board and a metal unit surrounding the circuit board and the ground plate. The metal unit includes a grounding portion electrically connected with the ground plate and a non-grounding portion electrically disconnected with the grounding portion. The feeding point is electrically connected with the non-grounding portion so that the non-grounding portion serves as a middle-high frequency radiator. A gap is provided between the non-grounding portion and the ground plate, and the ground plate is excited in a coupling manner so as to generate a current, such that the ground plate serves as a low frequency radiator. The antenna of the present disclosure covers all LTE frequency bands, which has advantages of less tuning difficulty and less influence by processing accuracy.

First claim

What is claimed is:

1. A long term evolution (LTE) full-band cellphone antenna structure, comprising:
a ground plate;
a circuit board having a feeding point;
a feeding terminal matching circuit provided on the circuit board; and
a metal unit surrounding the circuit board and the ground plate,
wherein the metal unit comprises a grounding portion electrically connected with the ground plate and a non-grounding portion electrically disconnected with the grounding portion, the feeding point is electrically connected with the non-grounding portion so that the non-grounding portion serves as a high frequency radiator, a gap is provided between the non-grounding portion and the ground plate, and the ground plate is excited in a manner of coupling so as to generate a current, such that the ground plate serves as a low frequency radiator;
the metal unit is a metal frame provided surrounding the ground plate and the circuit board, the ground plate has a pair of long edges and a pair of short edges connected with the long edges, the metal frame has a side edge spaced with the short edge of the ground plate, the side edge has two slottings which are arranged in parallel and spaced with each other, a portion between the two slottings is the non-grounding portion;
the LTE full-band antenna structure further comprises a duplex feeding unit, the duplex feeding unit has two feeding branches electrically connected with the non-grounding portion;
the duplex feeding unit is a metal sheet, the metal sheet is provided with a semi-closed slit, the slit extends to an edge of the metal sheet and forms an opening, so as to form two feeding branches which are electrically connected with the non-grounding portion.

2. The LTE full-band cellphone antenna structure as described in claim 1 , wherein the non-grounding portion takes the duplex feeding unit as a boundary point, a first portion from the duplex feeding unit to a slotting forms a first radiating branch, a second portion from the duplex feeding unit to another slotting forms a second radiating branch.

3. The LTE full-band cellphone antenna structure as described in claim 2 , wherein a length of the first radiating portion is larger than or equal to a length of the second radiating portion.

4. The LTE full-band cellphone antenna structure as described in claim 1 , wherein the feeding terminal matching circuit comprises two inductances which are arranged in parallel and a switch switchable between the two inductances.

Assignees

• Mai Jianchun
• Aac Technologies Pte Ltd

Inventors

• Mai Jianchun

Classifications

• H01Q1/243 Primary

  with built-in antennas · CPC title

• H01Q3/24

  varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching · CPC title

• H01Q5/335

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

• H01Q5/50

  Feeding or matching arrangements for broad-band or multi-band operation · CPC title

• H01Q1/48

  Earthing means; Earth screens; Counterpoises · CPC title