CN212725589U - Antenna module and mobile communication equipment - Google Patents
Antenna module and mobile communication equipment Download PDFInfo
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- CN212725589U CN212725589U CN202021927792.4U CN202021927792U CN212725589U CN 212725589 U CN212725589 U CN 212725589U CN 202021927792 U CN202021927792 U CN 202021927792U CN 212725589 U CN212725589 U CN 212725589U
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Abstract
The utility model provides an antenna assembly and mobile communication equipment, which comprises an antenna main body, a switch and an antenna matching circuit which are electrically connected in sequence; the antenna matching circuit comprises at least two radio frequency paths, wherein one radio frequency path is grounded through a capacitor, the other radio frequency paths are grounded through an inductor, the switch simultaneously switches on the at least two radio frequency paths, and one radio frequency path is provided with a capacitor. Because one of the radio frequency paths which are switched on simultaneously by the switch is provided with the capacitor, and the other radio frequency path is provided with the inductor, an LC circuit is formed, and the medium-high frequency performance of the antenna main body is not influenced when the switch is switched; meanwhile, no additional component is added, so that low-frequency loss of the antenna main body is ensured to be low. The problem of how to switch over the low frequency back at the switch under the condition of not splitting the antenna, when guaranteeing the antenna low frequency loss, high frequency performance is not influenced in the antenna is solved.
Description
Technical Field
The utility model relates to an antenna technology field, in particular to antenna module and mobile communication equipment.
Background
With the development of wireless communication technology, more and more requirements are put forward on the performance of the antenna, and not only more and more frequency bands covered by the antenna are required, but also the requirements of single-user peak rate and system capacity improvement are also met. For this reason, the most direct method is to increase the transmission bandwidth of the system. Therefore, the LTE-Advanced system introduces a technology of increasing transmission bandwidth, that is, CA (carrier aggregation). CA is to gather 2-5 LTE component carriers together, realizes the transmission bandwidth of maximum 100MHz, has effectively improved the transmission rate of uplink and downlink.
In the actual antenna debugging process, the low-frequency bandwidth cannot meet the coverage from 600MHz to 960MHz under the influence of the antenna environment, so that a switch must be added to solve the problem of the low-frequency bandwidth, and the antenna working state (frequency band, receiving state and transmitting state) connected between the antenna and the radio frequency processing circuit is switched through the switch to achieve the use of the antenna in different frequency bands. However, the switch causes a significant change in the medium-high frequency after each low frequency switch in the switching process, so that the medium-high frequency performance of the antenna is not ideal.
In order to solve the above problems, the following two solutions are generally adopted at present:
according to the first scheme, an antenna is split, so that a medium-high frequency part and a low-frequency part are independently separated, the medium-high frequency is not affected when a switch is switched, and the performance of the medium-high frequency is guaranteed; however, due to the limitation of the structure of the mobile phone, only one antenna can be split from the main set antenna and the diversity antenna in the mobile phone;
and the LC circuit is added, and the LC circuit is a filter essentially, so that the problem of large medium-high frequency change caused in the switching process can be solved, but the circuit is added, so that the antenna cost is increased, and the low-frequency loss is increased due to the addition of components.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an antenna module and mobile communication equipment to solve under the condition of not split antenna, how after the switch switches the low frequency, when guaranteeing the antenna low frequency loss, the not influenced problem of high frequency performance in the antenna.
In order to solve the above technical problem, the present invention provides an antenna assembly, which includes an antenna main body, a switch, and an antenna matching circuit, which are electrically connected in sequence; the antenna matching circuit comprises at least two radio frequency paths, wherein one radio frequency path is grounded through a capacitor, the other radio frequency paths are grounded through inductors, and the inductance values of all the inductors are not completely the same; the switch is configured to simultaneously turn on at least two of the radio frequency paths, wherein one of the radio frequency paths has a capacitor, and different radio frequency paths are turned on through the switch to realize low frequency switching of the antenna body.
Optionally, in the antenna assembly, inductance values of all the inductors are different.
Optionally, in the antenna assembly, the switch simultaneously switches on a radio frequency path having a capacitor and any one of radio frequency paths having an inductor, and when the switch switches on different radio frequency paths having inductors, the low frequency of the antenna body switches.
Optionally, in the antenna assembly, a capacitance value of the capacitor is 2.7pF to 5.6 pF.
Optionally, in the antenna assembly, an inductance value of the inductor is 4.3nH to 33 nH.
Optionally, in the antenna assembly, the antenna matching circuit includes a first radio frequency path, a second radio frequency path, a third radio frequency path, and a fourth radio frequency path, where the first radio frequency path is grounded through a capacitor having a capacitance value of 2.7pF to 5.6pF, the second radio frequency path is grounded through an inductor having an inductance value of 4.3nH to 8.2nH, the third radio frequency path is grounded through an inductor having an inductance value of 8.2nH to 15nH, and the fourth radio frequency path is grounded through an inductor having an inductance value of 15nH to 33 nH.
Optionally, in the antenna assembly, the switch is configured to: when the switch is simultaneously connected with the first radio frequency channel and the second radio frequency channel, the low frequency band of the antenna main body is 600 MHz-700 MHz; when the switch is simultaneously connected with the first radio frequency channel and the third radio frequency channel, the low frequency band of the antenna main body is 700 MHz-750 MHz; when the switch is simultaneously connected with the first radio frequency path and the fourth radio frequency path, the low frequency band of the antenna main body is 800 MHz-900 MHz.
Optionally, in the antenna assembly, the antenna assembly further includes an antenna support, and the antenna main body is disposed on a surface of the antenna support.
Optionally, in the antenna assembly, the antenna main body is an FPC antenna or an LDS antenna.
In order to solve the above technical problem, the present invention further provides a mobile communication device, which includes the antenna assembly as described above.
The utility model provides an antenna assembly and mobile communication equipment, which comprises an antenna main body, a switch and an antenna matching circuit which are electrically connected in sequence; the antenna matching circuit comprises at least two radio frequency paths, wherein one radio frequency path is grounded through a capacitor, the other radio frequency paths are grounded through inductors, and the inductance values of all the inductors are not completely the same; the switch is configured to simultaneously turn on at least two of the radio frequency paths, wherein one of the radio frequency paths has a capacitor, and different radio frequency paths are turned on through the switch to realize low frequency switching of the antenna body. Because the switch is simultaneously connected with at least two radio frequency paths, one radio frequency path is provided with a capacitor, and the other radio frequency path is provided with an inductor, an LC circuit is formed, and the medium-high frequency performance of the antenna main body is not influenced when the switch is switched; meanwhile, no additional component is added, so that low-frequency loss of the antenna main body is ensured to be low. The problem of how to switch over the low frequency back at the switch under the condition of not splitting the antenna, when guaranteeing the antenna low frequency loss, high frequency performance is not influenced in the antenna is solved.
Drawings
FIG. 1 is a graph of antenna efficiency test results for a prior art antenna assembly without an LC circuit incorporated therein;
FIG. 2 is a schematic circuit connection diagram of a prior art antenna assembly incorporating an LC circuit;
FIG. 3 is a graph of antenna efficiency testing results of a prior art antenna assembly incorporating an LC circuit;
fig. 4 is a schematic circuit diagram of the antenna assembly provided in this embodiment;
fig. 5 is a diagram illustrating the results of testing the antenna efficiency of the antenna assembly provided in this embodiment;
wherein the reference numerals are as follows:
an E-antenna; an L-inductor; c-capacitance; GND-ground; RF-radio frequency path.
Detailed Description
The antenna assembly and the mobile communication device according to the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.
Fig. 1 is a diagram illustrating the test results of the efficiency of the antenna without adding the LC matching circuit, which is obtained by adding a switch to implement the low-frequency switching of the antenna in the prior art. The switch divides the low frequency of the whole antenna body into three frequency ranges of 600 MHz-700 MHz, 700 MHz-750 MHz and 800 MHz-900 MHz, in the figure 1, B71 corresponds to the 600 MHz-700 MHz frequency range, B12 corresponds to 700 MHz-750 MHz, and B26 corresponds to 800 MHz-900 MHz. As can be seen from fig. 1, when the switch is switched, although frequency full coverage in a low frequency range can be achieved, the efficiency of the medium-high frequency band (1700MHz to 2700MHz) is unstable due to the switching effect of the switch, and large fluctuation occurs.
In order to solve the problem of poor medium-high frequency efficiency caused by switching, a matching circuit is added in the prior art to solve the problem of poor medium-high frequency performance of an antenna caused by switching, as shown in fig. 2, which is a schematic connection diagram of a commonly used antenna assembly circuit. The antenna body E1 is grounded to GND1 through an LC circuit including one capacitor C1 and one inductor L1 connected in parallel; in addition, the antenna body is grounded through a series-connected switch and a plurality of parallel radio frequency paths, wherein the switch and the radio frequency paths are connected in parallel with the LC circuit, and each radio frequency path only comprises one capacitor C2 or one inductor L. In this embodiment, the matching circuit includes 4 RF paths, which are RF1, RF2, RF3, and RF4, respectively, wherein a capacitor C2 is connected to the RF path RF1, an inductor L2 is connected to the RF path RF2, an inductor L3 is connected to the RF path RF3, and an inductor L4 is connected to the RF path RF4, wherein the inductors L2, L3, and L4 have different inductance values.
In the matching circuit in the prior art, the isolation between low frequency and medium and high frequency can be effectively realized through the LC circuit, so that the medium and high frequency are not influenced when the low frequency band is switched; meanwhile, different radio frequency paths in the matching circuit are switched on through the switch, so that the switching of the low frequency band is realized. However, the circuit connection has a large number of components, which results in large low-frequency loss. Fig. 3 shows the frequency efficiency result of the antenna body obtained by testing the matching circuit in the prior art, the switch divides the low frequency of the whole antenna body into three frequency ranges of 600MHz to 700MHz, 700MHz to 750MHz and 800MHz to 900MHz, in fig. 3, B71 corresponds to the 600MHz to 700MHz frequency range, B12 corresponds to 700MHz to 750MHz, and B26 corresponds to 800MHz to 900 MHz. As can be seen from fig. 3, when the switch is switched, although it can be ensured that the middle-high frequency is not affected when the switch is switched to the low-frequency band, and the full frequency coverage in the low-frequency range can be realized, the low-frequency loss is large, and the low-frequency efficiency is below-10 dB.
In view of the above, the present embodiment provides an antenna assembly including an antenna body E1, a switch, and an antenna matching circuit electrically connected in this order; the antenna matching circuit comprises at least two radio frequency paths RF, wherein one radio frequency path is grounded through a capacitor C, the other radio frequency paths are grounded through an inductor L, and the inductance values of all the inductors L are not completely the same; the switch is configured such that the switch simultaneously switches on at least two of the radio frequency paths RF, one of the radio frequency paths RF having a capacitor C, and different ones of the radio frequency paths RF are switched on by the switch to effect low frequency switching of the antenna body E1.
Specifically, in this embodiment, as shown in fig. 4, the antenna matching circuit includes 4 RF paths, which are RF1, RF2, RF3 and RF4, respectively, where the RF path RF1 is connected to a capacitor C1, the RF path RF2 is connected to an inductor L1, the RF path RF3 is connected to an inductor L2, and the RF path RF4 is connected to an inductor L3.
Further, in the antenna assembly provided by the present embodiment, inductance values of all the inductors are different, so that switching of the antenna frequency band can be achieved. Preferably, the value range endpoints of the inductors coincide with each other, so that a larger frequency range can be covered when the antenna frequency band is switched. The inductance of the inductor can range from 4.3nH to 33 nH.
In the antenna assembly provided in this embodiment, a capacitance value of the capacitor C1 is 2.7pF to 5.6pF, an inductance value of the inductor L1 is 4.3nH to 8.2nH, an inductance value of the inductor L2 is 8.2nH to 15nH, and an inductance value of the inductor L3 is 15nH to 33 nH.
The switch simultaneously switches on a radio frequency path with a capacitor and either a radio frequency path with an inductor at the time of low frequency switching of a particular antenna, and the low frequency of the antenna body switches when the switch switches on a different radio frequency path with an inductor. By simultaneously switching on the radio frequency path with the capacitor and any radio frequency path with the inductor, the switched-on part of the radio frequency path forms an LC circuit, the middle and high frequency bands can be isolated from the low frequency band, and the efficiency of the middle and high frequency bands is not influenced by the switching of the switch; meanwhile, the switching of the low frequency band of the antenna can be realized by switching on different radio frequency paths.
In the present embodiment, when the switch simultaneously turns on the radio frequency paths RF1 and RF2, the low frequency band of the antenna body is switched to 600MHz to 700 MHz; when the switch simultaneously switches on the radio frequency paths RF1 and RF3, the low frequency band of the antenna main body is switched to 700 MHz-750 MHz; and when the switch simultaneously turns on the radio frequency paths RF1 and RF4, the low frequency band of the antenna body is switched to 800 MHz-900 MHz.
Of course, in other embodiments, capacitors and inductors with different values may be provided, or even different numbers of radio frequency paths may be provided, and 3 or more radio frequency paths are simultaneously switched on by the switch, so as to realize switching of the antenna low frequency band. For example, 5 rf paths may be provided, and the switch turns on one rf path having a capacitor each time, and turns on 2 rf paths having different inductors at the same time, that is, two rf paths having different inductors are connected in parallel, and then equivalently regarded as one rf path having one inductor, so that the antenna matching circuit described in this embodiment is formed.
It should be noted that, the embodiment is only described by taking 4 rf paths as an example, and the implementation of other antenna matching circuits should also belong to the protection scope of the present invention on the basis of not departing from the principle of the embodiment.
Fig. 5 shows the frequency efficiency results of the antenna body tested by using the antenna matching circuit in the antenna assembly provided in this embodiment. As can be seen from fig. 5, when the switch performs low-frequency band switching, the overlap ratio of the middle-high frequency part is high, that is, the middle-high frequency part is hardly affected by the switching of the switch; fig. 5 and fig. 3 show that, compared with each other, the loss in the low frequency band is improved, and the low frequency efficiency is above-10 dB. Therefore, compared with the prior art, the antenna assembly provided by the embodiment can ensure low-frequency loss of the antenna and simultaneously does not affect the high-frequency performance of the antenna after the switch switches the low frequency.
In the antenna assembly provided by this embodiment, the antenna assembly further includes an antenna support, and the antenna main body is disposed on a surface of the antenna support. Specifically, the antenna main body is an FPC antenna or an LDS antenna. When the antenna main body is an FPC antenna, the antenna main body can be bonded and fixed on the surface of the antenna support through the back adhesive. When the antenna main body is the LDS antenna, the antenna main body can be directly laser-etched and plated on the surface of the antenna support through the LDS process. The specific implementation thereof is well known to those skilled in the art and will not be described herein.
The present embodiment also provides a mobile communication device including the antenna assembly as described above.
In summary, the antenna assembly and the mobile communication device provided in this embodiment include an antenna main body, a switch, and an antenna matching circuit, which are electrically connected in sequence; the antenna matching circuit comprises at least two radio frequency paths, wherein one radio frequency path is grounded through a capacitor, the other radio frequency paths are grounded through inductors, and the inductance values of all the inductors are not completely the same; the switch is configured to simultaneously turn on at least two of the radio frequency paths, wherein one of the radio frequency paths has a capacitor, and different radio frequency paths are turned on through the switch to realize low frequency switching of the antenna body. Because the switch is simultaneously connected with at least two radio frequency paths, one radio frequency path is provided with a capacitor, and the other radio frequency path is provided with an inductor, an LC circuit is formed, and the medium-high frequency performance of the antenna main body is not influenced when the switch is switched; meanwhile, no additional component is added, so that low-frequency loss of the antenna main body is ensured to be low. The problem of how to switch over the low frequency back at the switch under the condition of not splitting the antenna, when guaranteeing the antenna low frequency loss, high frequency performance is not influenced in the antenna is solved.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure are all within the scope of the claims.
Claims (10)
1. An antenna assembly, comprising an antenna body, a switch and an antenna matching circuit electrically connected in sequence; the antenna matching circuit comprises at least two radio frequency paths, wherein one radio frequency path is grounded through a capacitor, the other radio frequency paths are grounded through inductors, and the inductance values of all the inductors are not completely the same; the switch is configured to simultaneously turn on at least two of the radio frequency paths, wherein one of the radio frequency paths has a capacitor, and different radio frequency paths are turned on through the switch to realize low frequency switching of the antenna body.
2. The antenna assembly of claim 1, wherein the inductances of all of the inductors are different in value.
3. The antenna assembly of claim 1, wherein the switch simultaneously switches on a radio frequency path having a capacitor and either a radio frequency path having an inductor, and wherein the low frequency of the antenna body switches when the switch switches on a different radio frequency path having an inductor.
4. The antenna assembly of claim 1, wherein the capacitor has a capacitance value of 2.7pF to 5.6 pF.
5. The antenna assembly of claim 1, wherein the inductor has an inductance value of 4.3nH to 33 nH.
6. The antenna assembly of claim 1, wherein the antenna matching circuit comprises a first radio frequency path grounded through a capacitor having a capacitance of 2.7-5.6 pF, a second radio frequency path grounded through an inductor having an inductance of 4.3-8.2 nH, a third radio frequency path grounded through an inductor having an inductance of 8.2-15 nH, and a fourth radio frequency path grounded through an inductor having an inductance of 15-33 nH.
7. The antenna assembly of claim 6, wherein the switch is configured to: when the switch is simultaneously connected with the first radio frequency channel and the second radio frequency channel, the low frequency band of the antenna main body is 600 MHz-700 MHz; when the switch is simultaneously connected with the first radio frequency channel and the third radio frequency channel, the low frequency band of the antenna main body is 700 MHz-750 MHz; when the switch is simultaneously connected with the first radio frequency path and the fourth radio frequency path, the low frequency band of the antenna main body is 800 MHz-900 MHz.
8. The antenna assembly of claim 1, further comprising an antenna mount, the antenna body being disposed on a surface of the antenna mount.
9. The antenna assembly of claim 8, wherein the antenna body is an FPC antenna or an LDS antenna.
10. A mobile communication device, characterized in that the mobile communication device comprises an antenna assembly according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021927792.4U CN212725589U (en) | 2020-09-07 | 2020-09-07 | Antenna module and mobile communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021927792.4U CN212725589U (en) | 2020-09-07 | 2020-09-07 | Antenna module and mobile communication equipment |
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| Publication Number | Publication Date |
|---|---|
| CN212725589U true CN212725589U (en) | 2021-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021927792.4U Active CN212725589U (en) | 2020-09-07 | 2020-09-07 | Antenna module and mobile communication equipment |
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| CN (1) | CN212725589U (en) |
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- 2020-09-07 CN CN202021927792.4U patent/CN212725589U/en active Active
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Address after: 215300 Room 009, No. 55, Shengchuang Road, Yushan Town, Kunshan, Suzhou, Jiangsu Province Patentee after: KUNSHAN RUIXIANG XUNTONG COMMUNICATION TECHNOLOGY Co.,Ltd. Country or region after: China Address before: 215300 no.1689-5 Zizhu Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province Patentee before: KUNSHAN RUIXIANG XUNTONG COMMUNICATION TECHNOLOGY Co.,Ltd. Country or region before: China |