CN207021982U - Gps antenna circuit and its communication terminal - Google Patents
Gps antenna circuit and its communication terminal Download PDFInfo
- Publication number
- CN207021982U CN207021982U CN201720771671.7U CN201720771671U CN207021982U CN 207021982 U CN207021982 U CN 207021982U CN 201720771671 U CN201720771671 U CN 201720771671U CN 207021982 U CN207021982 U CN 207021982U
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- China
- Prior art keywords
- electric capacity
- wave filter
- inductance
- gps
- signal
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Abstract
The utility model discloses a kind of gps antenna circuit and its communication terminal.Wherein, gps antenna circuit includes antenna part and the wave filter being connected with each other；Antenna part is used for reception signal；The output end of wave filter is used to connect radio circuit；Wave filter is used to filter out the signal for being located at setting frequency range in reception signal, and the gps signal in reception signal is transmitted to radio circuit, wherein, the frequency of gps signal is higher than setting frequency range；Wherein, wave filter includes the first electric capacity, the second electric capacity, the first inductance, the second inductance, antenna part, the first electric capacity and the second electric capacity are connected in parallel, the output end of the first end connection wave filter of second electric capacity, first inductance is in parallel with the second electric capacity, and the second end of the second electric capacity is grounded by the first inductance.Interference of the signal to gps signal by the above-mentioned means, the utility model can abate the noise.
Description
Technical field
Technical field of mobile terminals is the utility model is related to, more particularly to a kind of gps antenna circuit and its communication terminal.
Background technology
With the development of the communications industry, communications band is more and more, especially with LTE (Long Term
Evolution, Long Term Evolution) technology, or even the development of upcoming 5G technologies, can only the communications band of handset compatibility can be more
More, the challenge brought to mobile phone industry can be bigger.
In the radio frequency circuit framework of GPS (Global Positioning System, global positioning system), low noise
Amplifier (Low Noise Amplifier, LAN) is a critically important module.After a signal is by LNA, it can produce
Multiple harmonic signal, when multiple harmonic signal just falls near GPS working frequency range, interfere with gps signal.
Utility model content
The utility model can disappear mainly solving the technical problems that provide a kind of gps antenna circuit and its communication terminal
Except interference of the noise signal to gps signal.
In order to solve the above technical problems, the technical scheme that the utility model uses is：There is provided a kind of for communicating end
The gps antenna circuit at end, include the antenna part and wave filter of interconnection；Antenna part is used for reception signal；Wave filter
Output end is used to connect radio circuit；Wave filter is used to filter out the signal for being located at setting frequency range in reception signal, and believes receiving
Gps signal in number is transmitted to radio circuit, wherein, the frequency of gps signal is higher than setting frequency range；Wherein, wave filter includes the
One electric capacity, the second electric capacity, the first inductance, the second inductance, antenna part, the first electric capacity and the second electric capacity are connected in parallel, the second electricity
The output end of the first end connection wave filter of appearance, the first inductance is in parallel with the second electric capacity, and the second end of the second electric capacity passes through first
Inductance is grounded.
In order to solve the above technical problems, another technical scheme that the utility model uses is：A kind of communication terminal is provided,
Including above-mentioned gps antenna circuit and radio circuit.
The beneficial effects of the utility model are：The situation of prior art is different from, gps antenna circuit of the present utility model leads to
Cross and set wave filter to filter out noise signal such as other communication frequency signals that frequency in reception signal is less than gps signal, avoid this
Noise signal is identical or close with gps signal frequency after subsequent treatment such as second harmonic, and then causes to do gps signal
Disturb, while the setting of the wave filter does not influence the carrier-to-noise ratio and total omnidirectional sensitivity of gps signal.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the utility model gps antenna circuit one；
Fig. 2 is the structural representation of another embodiment of the utility model gps antenna circuit；
Fig. 3 is the circuit diagram of the utility model gps antenna circuit another embodiment；
Fig. 4 is the partial circuit diagram in Fig. 3；
Fig. 5 is the partial circuit diagram in Fig. 3；
Fig. 6 is the structural representation of the embodiment of the utility model communication terminal one.
Embodiment
Referring to Fig. 1, Fig. 1 is the structural representation of the embodiment of the utility model gps antenna circuit one.As shown in figure 1,
Gps antenna circuit in present embodiment includes antenna 11, antenna-matching circuit 12, wave filter 13, low-noise amplifier 14.
The low-noise amplifier 14 of gps antenna circuit is connected to radio circuit 15, wherein, antenna 11 is sequentially connected antenna-matching circuit
12nd, wave filter 13, low-noise amplifier 14 and radio circuit 15.
Specifically, antenna 11 is used for reception signal；Antenna-matching circuit 12 is used to match antenna 11 and wave filter 13；Filtering
Device 13 is used to filter out the signal for being located at setting frequency range in reception signal, and the gps signal in reception signal is transmitted to radio frequency electrical
Road, wherein, the frequency of gps signal is higher than the setting frequency range；After low-noise amplifier 14 is filtered out for amplification by wave filter 13
Signal；Radio circuit 15 is used to carry out other processing to the signal after by low-noise amplifier 14 being amplified.
Wherein, wave filter 13 includes the first electric capacity 131, the second electric capacity 132, the 3rd electric capacity 133, the first inductance 134, second
Inductance 135, the 3rd inductance 136, antenna 11 and antenna-matching circuit 12, the first electric capacity 131, the second electric capacity 132, the 3rd electric capacity
133 are connected in series, and the output end of the first end connection wave filter 13 of the 3rd electric capacity 133, the output end of wave filter 13 is as described in Figure 1
1. the first end of the second electric capacity 132 is grounded by the first inductance 134, the second inductance 135 is in parallel with the second electric capacity 132, second
Second end of electric capacity 132 is grounded by the 3rd inductance 136.
Specifically, the first electric capacity 131, the second electric capacity 132, the 3rd electric capacity 133 are 4.7pF, the first inductance 134, second
Inductance 135, the 3rd inductance 136 are 6.8nH.
In addition, the setting frequency range for the signal that wave filter 13 is filtered out can be but not be limited to 779MHz-785MHz.
In another embodiment, the 3rd electric capacity 133 can be omitted in the wave filter 13 in gps antenna circuit, i.e.,
The output end of second electric capacity 132 and wave filter 13 is directly connected to.The 3rd inductance 136 or the first inductance 134 can not also be set, i.e., should
Only wherein one end is grounded second electric capacity 132 by inductance.
It is understood that in other embodiments, the gps antenna circuit also may not include antenna-matching circuit 12 and low
Noise amplifier 14, i.e., after antenna 11 is directly connected to wave filter 13, reconnect radio circuit 15 or through other process circuits such as
Radio circuit 15 is reconnected after above-mentioned low-noise amplifier.
Referring to Fig. 2, Fig. 2 is the structural representation of another embodiment of the utility model gps antenna circuit.Gps antenna
Circuit includes gps antenna 21, antenna-matching circuit 22, the first wave filter 23, the second wave filter 24, low-noise amplifier 25, the
Three wave filters 26, radio circuit 27.Wherein, gps antenna 21 is sequentially connected antenna-matching circuit 22, the first wave filter 23, second
Wave filter 24, low-noise amplifier 25, the 3rd wave filter 26, radio circuit 27.Gps antenna 21 can be gps antenna shell fragment.The
One wave filter 23 is above-mentioned wave filter, can filter out the signal that frequency range is 779MHz-785MHz；Second wave filter 24 and the 3rd filter
The reception signal Mid Frequency that ripple device 26 is used to filter out gps antenna 21 is the non-gps signal beyond 779MHz-785MHz.
In a concrete application, the wave filter of the gps antenna can be used for filtering out LTE_B13 signals, to avoid the signal from passing through
Gps signal is disturbed after follow-up second harmonic.Concrete reason is：The frequency of the gps signal received by gps antenna is
1575.42MHz, and the frequency of LTE_B13 [the band13 frequency ranges of (Long Term Evolution, Long Term Evolution)] signal exists
779MHz-785MHz, and this signal is sent out big by low-noise amplifier, the second harmonic of LTE_B13 signals is just in GPS
Near the frequency of signal, therefore, present embodiment median filter can filter out LTE_B13 signals, while not influence gps signal also
Carrier-to-noise ratio and total omnidirectional sensitivity.
In a concrete application, with reference to refering to Fig. 3-5, Fig. 3 is the utility model gps antenna circuit a further embodiment
Circuit diagram, Fig. 4 are the circuit signals of the radio circuit connected in the utility model gps antenna circuit a further embodiment
Figure, Fig. 5 are the partial circuit signals of the low noise amplifier connected in the utility model gps antenna circuit a further embodiment
Figure.The gps antenna circuit equally includes the element shown in Fig. 2, and specifically, gps antenna 31 includes the antenna part of multiple series connection
TP1-TP3, and two of which antenna part TP1 and TP2 are grounded, antenna part TP3 is connected to antenna-matching circuit 32.Antenna match electricity
Road 32 includes resistance R1, electric capacity C1 and inductance H1, and resistance R1 both ends connect the wave filter 33 of gps antenna 31 and first respectively, and
Distinguish inductance H1 and electric capacity C1 ground connection in resistance R1 both ends.First wave filter 33 is specifically as shown in Figure 1.Second wave filter 34 includes
One filtering chip FL1, and filtering chip FL1 input connects the output end of the first wave filter 33, earth terminal ground connection, output
End passes through electric capacity C2 connections low-noise amplifier 35.Tie point between second wave filter 34 and low-noise amplifier 35 also passes through electricity
Hold C3 ground connection.Low-noise amplifier 35 includes amplification chip MA, and amplification chip MA input passes through inductance H3 connections second
Wave filter 34, earth terminal ground connection, power end is used for input power signal and the power end is grounded by electric capacity C4, Enable Pin is used for
Receive enable signal and the Enable Pin is grounded by electric capacity C5, output end is used as the output end of low-noise amplifier 35 output amplification letter
Number.3rd wave filter 36 includes filtering chip FL2, and filtering chip FL2 input is filtered by electric capacity C6 connections the 3rd
Output end, earth terminal ground connection, the output end of device 36 pass through electric capacity C7 connections radio circuit 37.
Specifically, as shown in figure 5, radio circuit 37 includes a radio frequency chip MT, radio frequency chip MT the 39th pin
GPS_RFIN connects the output end of the 3rd wave filter 36 as the input of radio circuit 37, to obtain the warp of gps antenna output
Filtered signal.Wherein, the amplification chip MA of the low-noise amplifier 35 power end is powered by radio frequency chip MT, specifically
Such as Fig. 5, amplification chip MA power end connects radio frequency chip MT by electric capacity C5 ground connection, by VCN28_PMU ends, specifically,
By resistance R2 connection radio frequency chips MT the 40th pin GPS_AVDD18 ends, VCN28_PMU ends pass through resistance at VCN28_PMU ends
R3 connection radio frequency chips MT the 29th pin WB_AVDD18 ends, VCN28_PMU ends are grounded by electric capacity C8.
Gps antenna circuit of the present utility model is less than gps signal by setting wave filter to filter out frequency in reception signal
Noise signal such as other communication frequency signals, avoid the noise signal after subsequent treatment such as second harmonic with gps signal frequency
It is identical or close, and then cause the interference to gps signal, at the same the setting of the wave filter do not influence gps signal carrier-to-noise ratio and
Total omnidirectional sensitivity.
In addition, embodiment of the present utility model also includes a kind of communication terminal, as shown in fig. 6, Fig. 6 is the utility model
The structural representation of the embodiment of communication terminal one, the communication terminal 60 include gps antenna circuit 61 and radio circuit 62, its
In, gps antenna circuit 61 electrically connects radio circuit 62.In addition, the concrete structure of gps antenna circuit 61 and radio circuit 62 is such as
Described in above-mentioned embodiment.
Specifically, the communication terminal in present embodiment can be smart mobile phone or tablet personal computer.
Gps antenna circuit of the present utility model is less than gps signal by setting wave filter to filter out frequency in reception signal
Noise signal such as other communication frequency signals, avoid the noise signal after subsequent treatment such as second harmonic with gps signal frequency
It is identical or close, and then cause the interference to gps signal, at the same the setting of the wave filter do not influence gps signal carrier-to-noise ratio and
Total omnidirectional sensitivity.
Embodiment of the present utility model is the foregoing is only, not thereby limits the scope of the claims of the present utility model, it is every
The equivalent structure or equivalent flow conversion made using the utility model specification and accompanying drawing content, or be directly or indirectly used in
Other related technical areas, similarly it is included in scope of patent protection of the present utility model.
Claims (10)
1. a kind of gps antenna circuit for communication terminal, it is characterised in that antenna part and filtering including interconnection
Device；
The antenna part is used for reception signal；
The output end of the wave filter is used to connect radio circuit；The wave filter, which is used to filter out to be located in the reception signal, to be set
Determine the signal of frequency range, and the gps signal in the reception signal is transmitted to the radio circuit, wherein, the gps signal
Frequency is higher than the setting frequency range；
Wherein, the wave filter includes the first electric capacity, the second electric capacity, the first inductance, the second inductance, the antenna part, described
First electric capacity and the second electric capacity are connected in series, and the first end of second electric capacity connects the output end of the wave filter, and described the
Two inductance are in parallel with second electric capacity, and wherein one end of second electric capacity is grounded by first inductance.
2. gps antenna circuit according to claim 1, it is characterised in that
The wave filter also includes the 3rd inductance, and the second end of second electric capacity is grounded by first inductance；Described
The first end of two electric capacity is grounded by the 3rd inductance.
3. gps antenna circuit according to claim 2, it is characterised in that
The wave filter also includes the 3rd electric capacity, and the first end of second electric capacity passes through filtering described in the 3rd capacitance connection
The output end of device.
4. gps antenna circuit according to claim 2, it is characterised in that first electric capacity, second electric capacity and
3rd electric capacity is 4.7pF, and first inductance, second inductance and the 3rd inductance are 6.8nH.
5. gps antenna circuit according to claim 1, it is characterised in that the setting frequency range is 779MHz-785MHz.
6. gps antenna circuit according to claim 1, it is characterised in that also including an amplifier, the amplifier and institute
Wave filter is stated with the radio circuit to be connected.
7. gps antenna circuit according to claim 6, it is characterised in that the amplifier is a low-noise amplifier.
8. gps antenna circuit according to claim 1, it is characterised in that also including an antenna-matching circuit, the antenna
Match circuit is connected with the gps antenna and the wave filter.
9. a kind of communication terminal, it is characterised in that including the gps antenna circuit and radio frequency electrical described in any one of claim 1 to 8
Road.
10. communication terminal according to claim 9, it is characterised in that the communication terminal is smart mobile phone or flat board
Computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720771671.7U CN207021982U (en) | 2017-06-28 | 2017-06-28 | Gps antenna circuit and its communication terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720771671.7U CN207021982U (en) | 2017-06-28 | 2017-06-28 | Gps antenna circuit and its communication terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207021982U true CN207021982U (en) | 2018-02-16 |
Family
ID=61486434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720771671.7U Expired - Fee Related CN207021982U (en) | 2017-06-28 | 2017-06-28 | Gps antenna circuit and its communication terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207021982U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245786A (en) * | 2018-11-13 | 2019-01-18 | 上海艾为电子技术股份有限公司 | A kind of modular circuit applied in radio front end receiver |
| CN109889281A (en) * | 2019-03-27 | 2019-06-14 | 深圳前海达闼云端智能科技有限公司 | A kind of antenna detection device |
| CN112882063A (en) * | 2021-01-12 | 2021-06-01 | 上海移远通信技术股份有限公司 | Positioning module and communication equipment |
-
2017
- 2017-06-28 CN CN201720771671.7U patent/CN207021982U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245786A (en) * | 2018-11-13 | 2019-01-18 | 上海艾为电子技术股份有限公司 | A kind of modular circuit applied in radio front end receiver |
| CN109245786B (en) * | 2018-11-13 | 2023-12-01 | 上海艾为电子技术股份有限公司 | Module circuit applied to radio frequency front-end receiver |
| CN109889281A (en) * | 2019-03-27 | 2019-06-14 | 深圳前海达闼云端智能科技有限公司 | A kind of antenna detection device |
| CN109889281B (en) * | 2019-03-27 | 2021-09-28 | 深圳前海达闼云端智能科技有限公司 | Antenna detection device |
| CN112882063A (en) * | 2021-01-12 | 2021-06-01 | 上海移远通信技术股份有限公司 | Positioning module and communication equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180216 Termination date: 20180628 |