CN206313121U - A kind of new LTE/WWAN antennas - Google Patents

Abstract

The utility model provides a kind of new LTE/WWAN antennas, including antenna cabling, the antenna cabling includes the ground connection branch of the feed branch of connection distributing point and connection earth point, and the ground connection branch is provided with tuning circuit and/or drop SAR devices near one end of earth point；With drop SAR device circuits be incorporated into antenna Wiring structure tuning circuit by the utility model, and antenna tuning and drop SAR can be supported without considering the extra circuit for increasing plate end.Reduce the layout workloads at plate end, decrease connection cable, antenna has more integration, install simple, can broadened bandwidth, can also reduce the radiation of antenna pair human body, basis is widely used in Practical Project.

Description

A kind of new LTE/WWAN antennas

Technical field

The utility model is related to wireless communication field, more particularly, to new LTE/WWAN antennas.

Background technology

Along with the fast development and the continuous improvement of computer application performance of the communication technology, the informationization of social economy is entered Journey is gradually accelerated, and especially a new generation communication technology 4G comes into operation so that various mobile terminals such as notebook, mobile phone etc. set It is standby to start to increase more communications bands.For mobile terminal, support that full frequency band becomes the attraction of bright eye, but set for antenna For meter engineer, frequency range is continuously increased the difficulty for directly increasing Antenna Design.On the other hand, in recent years the public for spoke Penetrate safety problem growing interest, although the energy that the Wireless Telecom Equipment such as mobile phone, notebook is launched in normal work is very low, but It is these handheld devices very near apart from tissue in normal work, induction field will be produced in human body.Industry is introduced Biological dose specific absorption rate（SAR）To characterize influence degree of the electromagnetic radiation to human body.In actual applications, SAR is a survey Value, unit is W/kg.SAR value represents that the heat energy of mobile communication terminal can be known from experience on people and causes how many influences, and numerical value is bigger, table Show that the influence to human body is bigger；Otherwise then influence smaller.Therefore, how to reduce antenna SAR value operationally is Antenna Design Another problem that engineer faces.

In the prior art, it is necessary to when increasing communications band, then need to increase tuning circuit, it is necessary to reduce electromagnetism at mainboard end During the influence of Radiation On Human body, then need to increase drop SAR devices at mainboard end, so as to increased the pressure at mainboard end, and for Different types of electronic equipment, it becomes big to motherboard size, equipment overall dimensions is become big and be difficult to meet market will Ask.

Utility model content

In view of this, the technical problems to be solved in the utility model is to provide one kind and melts tuning circuit and drop SAR devices Enter antenna cabling, reduce the new LTE/WWAN antennas of plate end pressure.

In order to solve the above technical problems, the technical scheme that the utility model is provided is：A kind of new LTE/WWAN antennas, Including antenna cabling, the antenna cabling includes the ground connection branch of the feed branch of connection distributing point and connection earth point, described Ground connection branch is provided with tuning circuit and/or drop SAR devices near one end of earth point.

The antenna structure makes full use of the structural environment of antenna itself so that tuning circuit and drop SAR devices are walked with antenna Line fusion is integral.On the one hand the bandwidth of antenna is widened so that antenna turns into active antenna, can switch according to application scenarios Frequency range, on the other hand can reduce the radiation of antenna pair human body, reduce the harm to human body.For electronic equipment, can be without Consider the extra circuit for increasing plate end to support antenna tuning and drop SAR.The layout workloads at plate end are reduced, is decreased Connection cable, meanwhile, antenna has more integration, installs also simple.

Preferably, the ground connection branch at least one.The tuning circuit and drop SAR devices of application incorporate the side of antenna cabling Case can be used for the antenna structure of one or more ground connection branches, strong applicability, effect is significant.

Preferably, the tuning circuit and drop SAR devices are arranged at same ground connection branch or different ground connection branches.Tuning electricity Road can be arranged at same ground connection branch or different ground connection branches, reduction with drop SAR devices according to the design alternative of antenna cabling Design difficulty so that spatial distribution is more reasonable.

Preferably, the tuning circuit and drop SAR devices are arranged in parallel.When tuning circuit and drop SAR devices are arranged at together During one ground connection branch, the double effectses widened frequency band and reduce radiation effect are met by need to being only arranged in parallel.

Preferably, the tuning circuit is series at ground connection branch.

Preferably, the drop SAR devices are parallel to ground connection branch.

Preferably, the tuning circuit also concatenates isolation capacitance.Ensure the normal work of drop SAR device circuits.

Preferably, the drop SAR devices also concatenate lamped element, and the lamped element is inductance.Reduced with big degree and dropped Influence of the SAR devices to antenna.

Preferably, the tuning circuit includes tuning chip and control circuit.

Preferably, the drop SAR devices include sensing part, induction chip and its control circuit.

Preferably, the drop SAR devices include sensing part, induction chip and its control circuit.

LTE/WWAN antenna structures of the present utility model, most crucial place is by tuning circuit and drop SAR device fusions To in antenna element, integral antenna structure is formed.Tuning circuit and drop SAR devices may be located at same ground connection branch, also may be used With positioned at different ground connection branches.Tuning circuit is serially connected with ground connection branch side closely, and drop SAR devices are connected to ground connection point Branch side, and connect drop SAR devices ground connection branch need to concatenate isolation capacitance element ensure drop SAR device circuits normal work Make, it should be noted that in order to big degree reduces influence of the drop SAR devices to antenna to the greatest extent, and connect the side of drop SAR devices to need concatenation Lamped element inductance.And the tuning circuit in LTE/WWAN antenna structures of the present utility model and drop SAR devices part, it is also possible to Flexibly used according to different application scenarios, select tuning part therein or drop SAR device circuits part and antenna element Fusion.

Compared with prior art, the utility model has the following advantages that：

The utility model provides a kind of new LTE/WWAN antennas, and tuning circuit is incorporated into drop SAR device circuits In antenna Wiring structure, antenna tuning and drop SAR can be supported without considering the extra circuit for increasing plate end.Reduce plate end Layout workloads, decrease connection cable, and antenna has more integration, can broadened bandwidth, can also reduce antenna pair human body Radiation, basis is widely used in Practical Project.

Brief description of the drawings

Fig. 1 is the structural representation of the utility model embodiment 1.

Fig. 2 is the return loss plot of the utility model embodiment 1.

Fig. 3 is the structural representation of the utility model embodiment 2.

Wherein, 101 is distributing point, and 102 is the second earth point, and 103 is the first ground connection branch, and 104 is the second ground connection branch, 105 is isolation capacitance, and 106 is lamped element, and 107 is tuning circuit, and 108 is drop SAR devices, and G is earth point, and S is distributing point.

Specific embodiment

For the ease of it will be appreciated by those skilled in the art that entering to advance to the utility model below in conjunction with accompanying drawing and embodiment One step is described in detail.

Embodiment 1

As shown in figure 1, a kind of new LTE/WWAN antennas, including antenna cabling and mainboard end match circuit, antenna is walked Line includes distributing point 101 and earth point G, the lying copper region domain or board at earth point connection mainboard end metal part in itself, also Feed branch including connecting distributing point, connection earth point ground connection branch, the quantity that ground connection branch is set is according to actual debugging Demand judges that the present embodiment sets two ground connection branches, that is, connect the first ground connection branch 103 and the connection second of the first earth point Second ground connection branch 104 of earth point 102, isolation capacitance is concatenated in the second ground connection branch 104 at the second earth point 102 105 and tuning circuit 107, the desirable 10~40pF of capacitance of isolation capacitance, the present embodiment is set to 20pF, while second ground connection Branch 104 is also parallel with the branch road of lamped element inductance 106 and the concatenation of drop SAR devices 108, electricity near the end of the second earth point Inductance value is 70~100nH, and the present embodiment is set to 82nH.

Wherein, tuning circuit is arranged in series with ground connection branch, mainly includes tuning chip and control circuit.Tuning chip master To be there is provided by RFMD, ON Semiconductor, CK and Skyworks chip producer, be selected according to different application scenarios Corresponding chip and control circuit.

Drop SAR device circuit parts, branch is arranged in parallel with ground connection, main to include sensing part and induction chip and its control Circuit processed.According to different application scenarios and requirement, induction chip and control circuit are provided by corresponding chip producer.

As shown in Fig. 2 be the return loss plot of specific embodiment of the utility model, it can be seen that the antenna Low frequency part by tuning device, switch 4 states, cover 698~960MHz, HFS covers 1410~ 6000MHz, covers Japanese APJ frequency ranges, LTE Band 42 and 5G parts, disclosure satisfy that the full frequency band covering of current operator It is required that, have a wide range of applications basis.

Sensor chips are the core for dropping SAR devices, and the chip and test DEMO plates of this test are by producer SEMTECH is provided, and from the point of view of the data of test, the Sensor distance of reaction of the antenna is 15mm, can meet test request.

Embodiment 2

As shown in figure 3, the present embodiment is as different from Example 1, tuning circuit 107 is connected with the first ground connection branch, is dropped SAR devices are in parallel with the second ground connection branch, and same is that isolation capacitance 105 is connected to the second ground connection branch 104, lump original paper Inductance is serially connected with the parallel branch where dropping SAR devices.Remaining structure is same as Example 1.

According to different implementation occasions, two kinds of different embodiment antenna structures can selecting tuning circuit part 107 Implement with any one of SAR devices part 108 is dropped.

It is above wherein specific implementation of the present utility model, therefore its description is more specific and detailed, but can not be And it is interpreted as the limitation to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, Without departing from the concept of the premise utility, various modifications and improvements can be made, these obviously replace shape Formula belongs to protection domain of the present utility model.

Claims (10)

1. a kind of new LTE/WWAN antennas, including antenna cabling, the antenna cabling includes the feed point of connection distributing point The ground connection branch of branch and connection earth point, it is characterised in that：The ground connection branch is provided with tuning circuit near one end of earth point And/or drop SAR devices.

2. new LTE/WWAN antennas according to claim 1, it is characterised in that：The ground connection branch is at least one Bar.

3. new LTE/WWAN antennas according to claim 2, it is characterised in that：The tuning circuit and drop SAR dresses Install and be placed in same ground connection branch or different ground connection branches.

4. new LTE/WWAN antennas according to claim 1, it is characterised in that：The tuning circuit and drop SAR dresses Put and be arranged in parallel.

5. new LTE/WWAN antennas according to claim 1, it is characterised in that：The tuning circuit is series at ground connection Branch.

6. new LTE/WWAN antennas according to claim 1, it is characterised in that：The drop SAR devices are parallel to and connect Ground branch.

7. new LTE/WWAN antennas according to claim 1, it is characterised in that：The tuning circuit also concatenates isolation Electric capacity.

8. new LTE/WWAN antennas according to claim 1, it is characterised in that：The drop SAR devices also concatenate collection Total element, the lamped element is inductance.

9. new LTE/WWAN antennas according to claim 1, it is characterised in that：The tuning circuit includes tuning core Piece and control circuit.

10. new LTE/WWAN antennas according to claim 1, it is characterised in that：The drop SAR devices include sensing Part, induction chip and its control circuit.