CN111245450A - Intelligent wearable device - Google Patents
Intelligent wearable device Download PDFInfo
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- CN111245450A CN111245450A CN202010177151.XA CN202010177151A CN111245450A CN 111245450 A CN111245450 A CN 111245450A CN 202010177151 A CN202010177151 A CN 202010177151A CN 111245450 A CN111245450 A CN 111245450A
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- combiner
- frequency band
- receiving unit
- wearable device
- band receiving
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0053—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
- H04B1/0057—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using diplexing or multiplexing filters for selecting the desired band
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The embodiment of the application provides an intelligence wearing equipment, relates to communication technology field, can improve the performance of antenna under limited antenna space. This intelligence wearing equipment includes: the GNSS processing device comprises a first frequency band receiving unit and a second frequency band receiving unit; the first filter is connected in series between the first frequency band receiving unit and the first output end of the first combiner, and the second filter is connected in series between the second frequency band receiving unit and the second output end of the first combiner; the output end of the low-noise amplifier is electrically connected with the input end of the first combiner; a wireless transmission radio frequency processing device; a first output end of the second combiner is electrically connected to the input end of the low noise amplifier, and a second output end of the second combiner is electrically connected to the wireless transmission radio frequency processing device; and the antenna is electrically connected to the input end of the second combiner. The technical scheme is mainly used for satellite positioning.
Description
Technical Field
The application relates to the technical field of communication, in particular to intelligent wearable equipment.
Background
More and more mobile terminals have a satellite positioning function, and along with the development of chip technology, a satellite positioning radio frequency chip on the mobile terminal can support two frequency bands, and based on the support of the two frequency bands, two antennas corresponding to the two frequency bands can be respectively set.
Disclosure of Invention
This application technical scheme provides an intelligence wearing equipment, can improve the performance of antenna under limited antenna space.
First aspect, this application technical scheme provides an intelligence wearing equipment, includes: the GNSS processing device comprises a first frequency band receiving unit, a second frequency band receiving unit, a processing unit and a storage unit, wherein the processing unit is electrically connected with the first frequency band receiving unit, the second frequency band receiving unit and the storage unit; a first combiner having an input, a first output, and a second output; the first filter is connected between the first frequency band receiving unit and the first output end of the first combiner in series, and the second filter is connected between the second frequency band receiving unit and the second output end of the first combiner in series; the output end of the low-noise amplifier is electrically connected with the input end of the first combiner; a wireless transmission radio frequency processing device; the first output end of the second combiner is electrically connected with the input end of the low noise amplifier, and the second output end of the second combiner is electrically connected with the wireless transmission radio frequency processing device; and the antenna is electrically connected to the input end of the second combiner.
Optionally, the first frequency band receiving unit is configured to receive radio frequency signals in an L5 frequency band, and the second frequency band receiving unit is configured to receive radio frequency signals in an L1 frequency band.
Optionally, the wireless transmission radio frequency processing device is used for wireless fidelity data transmission and/or bluetooth data transmission.
Optionally, the antenna is a housing of the smart wearable device or a part of the housing of the smart wearable device.
Optionally, the first filter and the second filter are surface acoustic wave filters.
Optionally, the GNSS comprises the global satellite positioning system GPS, the global navigation satellite system GLONASS, the beidou satellite navigation system BDS, and the galileo satellite navigation system GSNS.
Optionally, the GNSS processing apparatus is a chip.
Optionally, the wireless transmission radio frequency processing device is a chip integrating a wireless fidelity data transmission function and a bluetooth data transmission function.
Optionally, the housing of the smart wearable device is a metal shell.
Optionally, the smart wearable device is a smart watch.
The intelligent wearable device in the embodiment of the application, two frequency band receiving units of the GNSS processing device correspond to two paths respectively, the two paths are connected to the same antenna, on each path from the antenna to the GNSS processing device, a second combiner, a low noise amplifier, a first combiner and a filter are sequentially arranged, the sequence relation among devices on the path is adjusted, so that the total noise on the final path is reduced, on the premise that the two frequency bands of the GNSS processing device use the same antenna, the noise is reduced, and the performance of the antenna is improved in a limited antenna space.
Drawings
Fig. 1 is a block diagram of an antenna assembly in a wearable device in the prior art;
fig. 2 is a block diagram of another antenna assembly in a wearable device in the prior art;
fig. 3 is a block diagram of an antenna assembly in an intelligent wearable device (e.g., a smart watch) in an embodiment of the present application.
Detailed Description
The terminology used in the description of the embodiments section of the present application is for the purpose of describing particular embodiments of the present application only and is not intended to be limiting of the present application.
Before describing the embodiments of the present application, a brief description will be given of a discovery process of a problem in the prior art, as shown in fig. 1, fig. 1 is a block diagram of an antenna assembly in a wearable device (e.g., a smart watch, etc.) in the prior art, the antenna assembly is disposed in an electronic device, the antenna assembly includes a Global Navigation Satellite System (GNSS) processing device 10 and a radio frequency transmission processing device 20, the radio frequency transmission processing device 20 is, for example, used for implementing bluetooth and/or Wi-Fi functions, the GNSS processing device 10 includes a first band receiving unit 101 and a second band receiving unit 102, the first band receiving unit 101 is electrically connected to a first antenna 501 through a first filter 301 and a first low noise amplifier 401 (LNA), the second band receiving unit 102 is electrically connected to an output end of a combiner 70 through a second filter 302 and a second low noise amplifier 402, the radio transmission rf processing device 20 is electrically connected to the other output end of the combiner 70, the input end of the combiner 70 is connected to the second antenna 502, so that the signal receiving path of the second frequency band receiving unit 102 and the signal receiving path of the radio transmission rf processing device 20 are combined and then connected to the same second antenna 502, that is, both the signal received by the GNSS processing device 10 through the second frequency band receiving unit 102 and the signal received by the radio transmission rf processing device 20 come from the second antenna 502, however, because two independent antennas need to be provided, on one hand, the antenna performance is adversely affected on the premise that the antenna space is limited; on the other hand, on the premise of ensuring the performance of the antenna, the space of the antenna occupies a larger space.
As shown in fig. 2, fig. 2 is a block diagram of another antenna assembly in a wearable device (e.g., a smart watch) in the prior art, where the GNSS processing apparatus 10 and the radio frequency transmission processing apparatus 20 share the same antenna 50, where the first frequency band receiving unit 101 and the second frequency band receiving unit 102 in the GNSS processing apparatus 10 are respectively connected to a first combiner 701 through two paths, a combination is implemented by the first combiner 701, the first combiner 701 and the radio frequency transmission processing apparatus 20 are combined by a second combiner 702, and the same antenna 50 is connected after the combination. Although the two frequency bands of the GNSS processing apparatus 10 in the solution shown in fig. 2 only use the same antenna 50, which reduces the occupied space of the antenna and avoids performance degradation caused by disposing two antennas in a limited space, an additional insertion loss is introduced due to adding a combiner in the radio frequency circuit. For example, the following are typical values of insertion loss of each device, the insertion loss of the first filter 301 and the second filter 302 is 1.1dB, the insertion loss of the first low noise amplifier 401 and the second low noise amplifier 402 is 0.65dB, the insertion loss of the first combiner 701 is 2dB, the insertion loss of the second combiner 702 is 0.8dB, and the insertion loss of the combiner 70 in fig. 1 is 0.8dB, and path noise from the antenna to the chip can be calculated according to the cascade relationship between the devices on the path between the antenna and the GNSS processing apparatus 10, where table 1 illustrates noise of the path corresponding to the second-band receiving unit 102 in the structure shown in fig. 1, and table 2 illustrates two path noise of the GNSS processing apparatus 10 in the structure shown in fig. 2.
TABLE 1
TABLE 2
Wherein, the noise or gain of each device has two forms of decibel expression and multiple expression, decibel expression is the common logarithm of multiple expression multiplied by 10, for example, the noise decibel expression of the combiner 6' in table 1 is 0.8 ≈ 10 × log101.2。
The total noise on one path is obtained according to the following cascaded calculation formula:
wherein, F1、F2、…、FnSequentially represents the multiple expression of the noise of each device on the path from the antenna to the GNSS processing device 10 in the path, F1Representing the noise fold expression of the first device in the path, F2Representing the noise fold expression of the second device in the path, and so on, FnRepresenting the noise fold expression of the last device in the path, and similarly, G1、G2、…、GnSequentially represents the multiple expression of the gain of each device on the path from the antenna to the GNSS processing apparatus 10 in the path, G1Representing the gain multiple expression of the first device in the path, G2Expressing the gain multiple expression of the second device in the path, and so on, GnRepresenting the noise fold expression of the last device in the path.
According to the above cascade calculation formula, the total noise of the path corresponding to the second band receiving unit 102 in the structure shown in fig. 1 is:
In the structure shown in fig. 2, the total noise of the path corresponding to the second band receiving unit 102 is:
In the structure shown in fig. 2, the total noise of the path corresponding to the first band receiving unit 101 is:
It can be seen that, in the technical solution shown in fig. 2, the path noise corresponding to the second frequency band receiving unit 102 is 3.45dB, which is about 2dB higher than the path noise 1.46dB corresponding to the second frequency band receiving unit 102 in fig. 1, and the noise of F1' also reaches 3.46dB, and the performance of the GNSS processing apparatus 10 is larger when the noise is larger, and the technical solution shown in fig. 2 causes the same antenna to be used in two frequency bands, but the performance of the antenna is deteriorated.
The following description is provided to an embodiment of the present application, an embodiment of the present application provides an intelligent wearable device, where the intelligent wearable device includes an antenna assembly, as shown in fig. 3, fig. 3 is a structural block diagram of an antenna assembly in the intelligent wearable device (for example, an intelligent watch, and the like) in the embodiment of the present application, and the antenna assembly includes: the GNSS processing apparatus 1 includes a first frequency band receiving unit 11, a second frequency band receiving unit 12, a processing unit 13 and a storage unit 14, wherein the processing unit 13 is electrically connected to the first frequency band receiving unit 11, the second frequency band receiving unit 12 and the storage unit 14; the antenna module of intelligence wearing equipment still includes: a first combiner 21, the first combiner 21 having an input terminal In, a first output terminal O1, and a second output terminal O2; a first filter 31, the first filter 31 being connected in series between the first band receiving unit 11 and the first output terminal O1 of the first combiner 21; a second filter 32, the second filter 32 being connected in series between the second band receiving unit 12 and the second output terminal O2 of the first combiner 21; the low-noise amplifier 4, the output end of the low-noise amplifier 4 is electrically connected to the input end In of the first combiner 21, the radio frequency processing unit 2 of the wireless transmission; a second combiner 22, the second combiner 22 having an input terminal In, a first output terminal O1 and a second output terminal O2, the first output terminal O1 of the second combiner 22 being electrically connected to the input terminal of the low noise amplifier 4, the second output terminal O2 of the second combiner 22 being electrically connected to the wireless transmission rf processing apparatus 2; the antenna 5 and the antenna 5 are electrically connected to the input terminal In of the second combiner 22.
Specifically, in the antenna assembly, the antenna 5 is configured to receive an electromagnetic wave signal, the low noise amplifier 4 amplifies a signal received by the antenna 5, the first combiner 21 is configured to divide the signal into two paths, one path of the signal is received by the first frequency band receiving unit 11 of the GNSS processing apparatus 1 after passing through the filtering action of the first filter 31, the other path of the signal is received by the second frequency band receiving unit 12 of the GNSS processing apparatus 1 after passing through the filtering action of the second filter 32, the GNSS processing apparatus 1 receives the signal through the receiving units of two different frequency bands, and a positioning result is calculated by using the signal received by the antenna 5, so as to implement a satellite positioning function. The GNSS processing apparatus 1 may be specifically a chip, and the GNSS processing apparatus 1 provides a signal processing function for the GNSS, for example, including converting an analog signal into a digital signal, and the GNSS may include a Global Positioning System (GPS), a global navigation satellite system (GLONASS), a beidou satellite navigation system (BDS), and a Galileo Satellite Navigation System (GSNS). The first filter 31 and the second filter 32 may be Surface Acoustic Wave (SAW) filters.
As shown in table 3, table 3 illustrates two paths of noise of the GNSS processing apparatus in the configuration shown in fig. 3, which are a path from the antenna 5 to the first band receiving unit 11 and a path from the antenna 5 to the second band receiving unit 12, respectively.
TABLE 3
In the configuration shown in fig. 3, the path corresponding to the first band receiving unit 11 and the path corresponding to the second band receiving unit 12 have the same low noise amplifier 4, but for convenience of comparison with the configurations shown in fig. 1 and 2, in table 3, the low noise amplifiers 4 in the two paths are set to have different gain parameters.
The total noise of the path corresponding to the second band receiving unit 12 in the structure shown in fig. 3 is:
The total noise of the path corresponding to the first band receiving unit 11 in the structure shown in fig. 3 is:
Comparing the data in table 3 and table 2, it can be seen that, under the same device parameters, the noise of both paths is reduced in the embodiment of the present application, and the lower the noise is, the stronger the signal received by the GNSS processing apparatus is, the more accurate the calculated positioning result is, that is, the higher the performance of the whole antenna assembly is. The reason for the noise reduction is that, in the configuration shown in fig. 3, compared to the configuration shown in fig. 2, the order between the low noise amplifier and the first combiner is changed on the path from the antenna to the GNSS processing apparatus, so that the gain of the low noise amplifier is included in a larger fraction of the numerator according to the above-mentioned cascade calculation formula, and the gain of the low noise amplifier is larger in all the devices of the path, and therefore, after the order is adjusted, the calculation result of the total noise is reduced, that is, the effect of reducing the noise is achieved. The structure shown in fig. 3 has similar noise in the path compared to fig. 1, but the structure shown in fig. 1 uses two independent antennas for the same GNSS processing apparatus, and the antenna assembly occupies a large space.
The intelligent wearable device in the embodiment of the application, two frequency band receiving units of the GNSS processing device correspond to two paths respectively, the two paths are connected to the same antenna, on each path from the antenna to the GNSS processing device, a second combiner, a low noise amplifier, a first combiner and a filter are sequentially arranged, the sequence relation among devices on the path is adjusted, so that the total noise on the final path is reduced, on the premise that the two frequency bands of the GNSS processing device use the same antenna, the noise is reduced, and the performance of the antenna is improved in a limited antenna space.
Optionally, the first frequency band receiving unit 11 is used for receiving radio frequency signals in the L5 frequency band, and the second frequency band receiving unit 12 is used for receiving radio frequency signals in the L1 frequency band. The function of an L5 frequency band is added to the original satellite positioning function of the L1 frequency band, and the dual-frequency GNSS is realized.
Optionally, the wireless transmission rf processing apparatus 2 is configured to perform wireless fidelity (Wi-Fi) data transmission and/or Bluetooth (BT) data transmission, and the wireless transmission rf processing apparatus 2 may specifically be a chip, that is, the Wi-Fi and the bluetooth functions may be integrated in the same chip.
In other embodiments, the housing of the smart-wearable device or a portion of the housing of the smart-wearable device may serve as the antenna 5 in the antenna assembly. For example, with the trend of miniaturization of the terminal size, more and more electronic devices select a metal shell to be directly utilized as an antenna, that is, the housing of the smart wearable device is a metal shell, in such electronic devices, the metal shell, that is, the physical limitation on the antenna, is more and more, in order to ensure the integrity of the housing and ensure the performance of the antenna, the limitation on the number of antennas of the electronic devices is larger, and therefore, based on the electronic device using the housing as the antenna, by applying the technical scheme of the embodiment of the present application, the performance of the antenna can be improved on the premise of using a smaller number of antennas.
Optionally, above-mentioned intelligent wearing equipment can be electronic equipment such as intelligent wrist-watch, and this type of intelligent wearing equipment is great to the restriction of size, has further restricted the space of antenna promptly, consequently, in intelligent wearing equipment, the technical scheme of this application embodiment of using can improve the performance of antenna under the prerequisite of using less quantity of antenna.
In the embodiments of the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, and means that there may be three relationships, for example, a and/or B, and may mean that a exists alone, a and B exist simultaneously, and B exists alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" and similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one of a, b, and c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. An intelligence wearing equipment which characterized in that includes:
the GNSS processing device comprises a first frequency band receiving unit, a second frequency band receiving unit, a processing unit and a storage unit, wherein the processing unit is electrically connected with the first frequency band receiving unit, the second frequency band receiving unit and the storage unit;
a first combiner having an input, a first output, and a second output;
a first filter connected in series between the first frequency band receiving unit and a first output terminal of the first combiner;
a second filter connected in series between the second frequency band receiving unit and the second output terminal of the first combiner;
the output end of the low-noise amplifier is electrically connected with the input end of the first combiner;
a wireless transmission radio frequency processing device;
the second combiner is provided with an input end, a first output end and a second output end, the first output end of the second combiner is electrically connected to the input end of the low noise amplifier, and the second output end of the second combiner is electrically connected to the wireless transmission radio frequency processing device;
and the antenna is electrically connected to the input end of the second combiner.
2. The smart wearable device according to claim 1,
the first frequency band receiving unit is used for receiving radio frequency signals of an L5 frequency band, and the second frequency band receiving unit is used for receiving radio frequency signals of an L1 frequency band.
3. The smart wearable device according to claim 2,
the wireless transmission radio frequency processing device is used for wireless fidelity data transmission and/or Bluetooth data transmission.
4. The smart wearable device according to claim 1,
the antenna is a shell of the intelligent wearable device or a part of the shell of the intelligent wearable device.
5. The smart wearable device according to claim 1,
the first filter and the second filter are surface acoustic wave filters.
6. The smart wearable device according to claim 1,
the GNSS comprises a global positioning system GPS, a global navigation satellite system GLONASS, a Beidou satellite navigation system BDS and a Galileo satellite navigation system GSNS.
7. The smart wearable device according to claim 1,
the GNSS processing device is a chip.
8. The smart wearable device according to claim 3,
the wireless transmission radio frequency processing device is a chip integrating a wireless fidelity data transmission function and a Bluetooth data transmission function.
9. The smart wearable device according to claim 4,
the shell of the intelligent wearable device is a metal shell.
10. The smart wearable device according to claim 1,
the intelligent wearable device is an intelligent watch.
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| CN202010177151.XA CN111245450A (en) | 2020-03-13 | 2020-03-13 | Intelligent wearable device |
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| CN202010177151.XA CN111245450A (en) | 2020-03-13 | 2020-03-13 | Intelligent wearable device |
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Cited By (2)
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| CN112290973A (en) * | 2020-10-23 | 2021-01-29 | 国信军创(岳阳)六九零六科技有限公司 | Combiner |
| CN114928370A (en) * | 2022-04-22 | 2022-08-19 | 杭州中科微电子有限公司 | Radio frequency structure applied to GNSS high-performance dual-frequency active antenna |
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