CN205488548U

CN205488548U - Composite antenna

Info

Publication number: CN205488548U
Application number: CN201620035547.XU
Authority: CN
Inventors: 邹裕铨; 陈羿安; 刘纮铭; 刘咏昌
Original assignee: Kunshan Liantao Electronics Co Ltd
Current assignee: Kunshan Liantao Electronics Co Ltd
Priority date: 2016-01-15
Filing date: 2016-01-15
Publication date: 2016-08-17
Anticipated expiration: 2026-01-15

Abstract

The utility model relates to a composite antenna, it includes spaced apart first, a second antenna and a metal ground plane first, the 2nd antenna connection, first, the same ground plane of second antenna sharing, the ground plane is equipped with a slotted hole that lies in between first, the second antenna, it has a chip capacity cell to increase in the slotted hole, can effectively regulate and control the frequency band of slotted hole isolation, need not the amount of disbursement external space and extends the incomplete branch in ground, does not just have too big influence to the resonance mode of primary antenna, composite antenna structure simple, and easy the realization also must influence the original resonance frequency of antenna.

Description

Combined antenna

Technical field

This utility model relates to a kind of composite antenna structure, particularly relates to a kind of combined antenna being made up of two or more antenna.

Background technology

In mobile device (Handheld Device or Notebook) now, MIMO technology (Multiple-Input Multiple-Output, multiple receiving terminals and multiple transmitting terminals) become the basic outfit of product with the multiaerial system possessing diversity performance, but limited by the environment of mobile device, the distance between antenna and putting position, often cannot freely determine.

Generally speaking the distance between antenna is too small, can cause the close coupling between antenna, causes the transfer rate reducing antenna, for antenna designers, in narrow space, build out multiaerial system, and reduce the close coupling between antenna, be the key factor that must take in during design.In the past, designer for the isolation in lifting operation frequency range, many common technology, such as: electromagnetism section gap structure (Electromagnetic Band-Gap, EBG), change ground plane broken ground structure (Defected Ground Structure, DGS), to be adjacent antenna highlight ground plane or newly-increased isolation element to promote isolation with one.But, said method need to take bigger design area, and is difficult to arrange in the mobile device.

Wherein, although electromagnetism section gap structure can utilize high frequency capacitance wall, it is provided that noise ground path, when high-frequency operation, the effect of isolation is good；When high-frequency operation, the integrity of signal is affected less, but, in the place of high frequency, electric capacity portion's resonance effect within the walls can produce new resonance point；The method using electric capacity wall, for the practical layout of printed circuit board (PCB), it is achieved relatively difficult (occupied area is bigger) and required relatively costly.

Although change ground plane broken ground structure isolation effect good, easily realize.But, need to account for part system ground plane, is easily subject to environment or mechanism limits during use.

Although newly-increased isolation element can reduce the coupling amount between two antennas, however it is necessary that exceptional space, to configure this isolation element, is easier to constrained environment and mechanism's configuration impact.

Utility model content

The purpose of this utility model there are provided a kind of can the combined antenna of frequency band of Effective Regulation slotted eye isolation.

For realizing object defined above, this utility model adopts the following technical scheme that a kind of combined antenna, it includes the metal ground plane that first, second spaced apart antenna and first, second antenna connect, same ground plane shared by first, second antenna, described ground plane is provided with the slotted eye between first, second antenna, and increasing in described slotted eye has at least one chip capacity element.

As further improvement of the utility model, the distance of described first, second antenna is less than or equal to λ/4.

As further improvement of the utility model, described slotted eye length is less than or equal to λ/4.

As further improvement of the utility model, described first antenna and the second antenna are WLAN, Monopole, IFA or PIFA type antenna.

This utility model combined antenna increases by a chip capacity element in slotted eye, can the frequency band of Effective Regulation slotted eye isolation, without using exceptional space to extend the residual branch in ground, and the resonance mode for primary antenna there is no the biggest impact, combined antenna framework is simple, easily realize, also will not affect antenna original resonance frequency.

Accompanying drawing explanation

Fig. 1 is the floor map of this utility model combined antenna.

Detailed description of the invention

Referring to shown in Fig. 1, this utility model combined antenna 10 includes the metal ground plane 13 that first, second spaced apart antenna 11,12 is connected with first, second antenna 11,12, and same ground plane 13 shared by i.e. first, second antenna 11,12.

Ground plane 13 is provided with a slotted eye 130, and the transverse current of ground plane 13, between first antenna 11 and the second antenna 12, can be guided to slotted eye 130, improve first antenna 11 and the effect of the second antenna 12 isolation by slotted eye 130.

First antenna 11 and the second antenna 12 are WLAN antenna, but it is not limited to WLAN antenna, can be used for Monopole, IFA, the type antenna such as PIFA, first antenna 11 and the second antenna 12 act between 2.4 ~ 2.5GHz, and first, second antenna 11, distance L of 12 is less than or equal to λ/4, coupling amount is-10dB, the method of there is no meets the common-use size (<-15dB) of common product, this utility model increases by a chip capacity element 132 in slotted eye 130, can the frequency band of Effective Regulation isolation, the capacitance of chip capacity element 132 is the lowest, the resonant frequency that first antenna 11 produces with the second antenna 12 is the highest, synopsis is as follows:

The capacitance (pF) of capacity cell	0.6	0.5	0.4	0.3	0.2
						Resonant frequency (GHz)	2.4	3.0	3.6	4.2	5.1

This utility model combined antenna 10 is under the reflection coefficient not affecting antenna, utilize and be provided with a slotted eye 130 and a newly-increased chip capacity element 132 at ground plane 13, and this slotted eye 130 length S is only smaller than or can reach equal to λ/4 length, and utilize chip capacity element 132 regulation and control need to improve the frequency band of isolation, isolation in frequency band all can optimize 10 more than dB, this utility model difference maximum with existing design is, without using exceptional space to extend the residual branch in ground, and the resonance mode for primary antenna there is no the biggest impact.

In sum, this utility model combined antenna 10 has the advantage that

1. framework is simple: need to be with multiple groovings or use specific grooving form compared to existing isolation element, and this utility model only need to be by a simple grooved bore structure, and the frequency band of the required isolation of an i.e. controllable of chip capacity element 132 of arranging in pairs or groups.

The most easily realize: mostly being stereochemical structure compared to existing isolation element, this utility model i.e. can reach the effect of good isolation with plane grooving.

The most not affecting antenna original resonance frequency: comparing existing isolation element can affect the resonance mode of primary antenna, the resonance mode of primary antenna is affected less by this utility model.

Although being example purpose, have been disclosed for preferred implementation of the present utility model, but those of ordinary skill in the art is it will be appreciated that in the case of without departing from by scope and spirit of the present utility model disclosed in appending claims, various improvement, to increase and replace be possible.

Claims

1. a combined antenna, it includes the metal ground plane that first, second spaced apart antenna and first, second antenna connect, same ground plane shared by first, second antenna, described ground plane is provided with the slotted eye between first, second antenna, it is characterised in that: increase in described slotted eye and have at least one chip capacity element.

Combined antenna the most according to claim 1, it is characterised in that: the distance of described first, second antenna is less than or equal to λ/4.

Combined antenna the most according to claim 1, it is characterised in that: described slotted eye length is less than or equal to λ/4.

Combined antenna the most according to claim 1, it is characterised in that: described first antenna and the second antenna are WLAN, Monopole, IFA or PIFA type antenna.