CN214756369U - Transmitting antenna and receiving antenna standing-wave ratio measuring system - Google Patents
Transmitting antenna and receiving antenna standing-wave ratio measuring system Download PDFInfo
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- CN214756369U CN214756369U CN202120976260.8U CN202120976260U CN214756369U CN 214756369 U CN214756369 U CN 214756369U CN 202120976260 U CN202120976260 U CN 202120976260U CN 214756369 U CN214756369 U CN 214756369U
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- 238000005259 measurement Methods 0.000 claims abstract description 13
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- 238000004804 winding Methods 0.000 claims description 56
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Abstract
The utility model belongs to the field of communication equipment measurement, relates to a transmitting antenna and receiving antenna standing-wave ratio measurement system, and discloses a transmitting antenna standing-wave ratio measurement system, which comprises a transmitting antenna with an adjustable oscillator, a directional coupler arranged between a transmitter connecting end and the transmitting antenna, and a second signal source with adjustable frequency and used for active injection, wherein the directional coupler is provided with a front directional coupler and a rear directional coupler, the front directional coupler is provided with two detection ports which are respectively connected with a second signal source and a load, the two detection ports of the rear directional coupler are respectively connected with an incident power detection circuit and a reflected power detection circuit, the transmitter connecting end is connected with an input port of the front directional coupler, an output port of the front directional coupler is connected with an input port of the rear directional coupler, an output port of the rear directional coupler is connected with the transmitting antenna, and the system is favorable for improving the working efficiency of the antenna standing-wave ratio, the system maintainability is enhanced.
Description
Technical Field
The utility model belongs to communication equipment measures the field, relates to antenna standing-wave ratio measurement system, specifically indicates transmitting antenna and receiving antenna standing-wave ratio measurement system.
Background
The standing-wave ratio parameter of the radio frequency antenna is an important index performance reflecting the matching degree of the antenna and the transceiver. Referring to fig. 3, in the prior art, a pass-through power meter is connected in series between a transmitter and an antenna, and the operating principle of the pass-through power meter is to obtain the incident power and the reflected power of the antenna through a directional coupler and detect the incident power and the reflected power to obtain the standing wave ratio of the radio frequency antenna.
Adjusting the physical length of the antenna element to obtain good radio wave transmitting or receiving effect is a common technical means in the field. When the antenna is adjusted in a telescopic mode, theoretically, a standing wave ratio can be obtained through an output signal of a transmitter through a traditional directional coupler to judge whether the telescopic position of the antenna meets the transmission requirement or not, but the power range of a high-power transmitter is very large (from hundreds of watts to more than kilowatt), if the telescopic size of the antenna is not adjusted in place, the output mismatch between the telescopic antenna and the transmitter is large easily caused by searching the optimal antenna size in a successive approximation mode, and the transmitter can be damaged seriously; although there is also a method of memorizing the relationship between the size and the frequency of the retractable antenna in advance by a vector network analyzer, the corresponding relationship may cause an error of the corresponding relationship with the mechanical wear of the antenna or the change of the external environment; in addition, some transmitters in special occasions (such as military field) are inconvenient to disconnect the connection state of the transmitter and the antenna at will, but the antenna needs to be adjusted to the working frequency in advance and then can be transmitted with high power, and obviously, the standing-wave ratio of the antenna cannot be detected in advance by using the signal transmitted by the transmitter or the antenna can be directly measured by using a vector network analyzer. The use of conventional means for standing wave measurement by means of transmitter signals or vector network analyzer measurements has certain drawbacks in these situations.
In addition, as a receiving antenna (such as a GPS receiving antenna) of a radio receiving terminal has no transmitter, it is impossible to measure the standing-wave ratio of the receiving antenna by using a conventional standing-wave meter, and although the receiving antenna is tested for the standing-wave ratio by a vector network analyzer in the design and production inspection processes, the standing-wave ratio of the receiving antenna may be drastically changed due to the influence of the surrounding environmental factors such as human body, building, car body, etc., thereby affecting the whole receiving effect.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a simple structure adapts to extensive transmitting antenna standing-wave ratio measurement system in scene and application method.
The technical scheme for realizing the aim is that,
a transmitting antenna standing-wave ratio measuring system comprises a transmitting antenna with an adjustable oscillator, a directional coupler and a second signal source, wherein the directional coupler is arranged between a connecting end of a transmitter and the transmitting antenna, the second signal source is adjustable in frequency and used for active injection, the directional coupler is provided with a front directional coupler and a rear directional coupler, the front directional coupler is provided with two detection ports which are respectively connected with a second signal source and a load, the two detection ports of the rear directional coupler are respectively connected with an incident power detection circuit and a reflected power detection circuit, the connecting end of the transmitter is connected with an input port of the front directional coupler, an output port of the front directional coupler is connected with an input port of the rear directional coupler, an output port of the rear directional coupler is connected with the transmitting antenna, and signals of the second signal source sequentially pass through the front directional coupler and the rear directional coupler and reach the transmitting antenna.
Further, the front directional coupler comprises two transformers T1 and T2, one end of an input winding of the transformer T1 is connected with the connecting end of the transmitter, the other end of the input winding of the transformer T1 is respectively connected with one end of an output winding of the rear directional coupler and the transformer T2, and the other end of the output winding of the transformer T2 is grounded; one end of an output winding of the T1 transformer is grounded, the other end of the output winding of the T1 transformer is respectively connected with a load input end and one end of an input winding of the T2 transformer, an output end of the load is grounded, and the other end of the input winding of the T2 transformer is connected with a second signal source.
Further, the load is a resistor.
Furthermore, the rear directional coupler comprises two transformers T3 and T4, one end of an input winding of the transformer T3 is connected with the front directional coupler, the other end of the input winding of the transformer T3 is respectively connected with the transmitting antenna and one end of an output winding of the transformer T4, and the other end of the output winding of the transformer T4 is grounded; one end of an output winding of the T3 transformer is grounded, the other end of the output winding of the T3 transformer is respectively connected with the incident power detection circuit and one end of an input winding of the T4 transformer, and the other end of the input winding of the T2 transformer reflects the power detection circuit.
The use method of the transmitting antenna standing wave ratio measuring system comprises the following steps,
step a, adjusting the length of a transmitting antenna oscillator;
and b, injecting a frequency signal to be measured into the transmitting antenna by the second signal source through the front directional coupler.
The transmitting antenna standing-wave ratio measuring system of the utility model is based on the existing through type power meter principle, and uses the second path of signal source to actively inject into the through type power circuit to realize the transmitting antenna standing wave measurement at any frequency point; overcome traditional through type power meter and must rely on the power and the frequency of transmitter to carry out standing wave measuring shortcoming, simultaneously the utility model discloses a function that the transmitting antenna standing wave also can be measured to through type power circuit's back directional coupler has remained the transmitter normal during operation, especially in the high-power transmission occasion more than 100W-1KW, the transmitter need not to transmit high-power signal, measurement system also need not break off with being connected of transmitter, the user scans the standing-wave ratio of judging on-the-spot transmitting antenna through the frequency signal who pours into arbitrary needs, can measure the resonance point of a certain oscillator length to flexible antenna, thereby be favorable to the adjustment and the matching of on-the-spot transmitting antenna oscillator length, and the work efficiency is improved, and the system maintainability performance is strengthened.
Another object of the present invention is to provide a system for measuring standing-wave ratio of receiving antenna which can realize on-line real-time measurement function.
A standing-wave ratio measuring system of a receiving antenna comprises the receiving antenna, a directional coupler arranged between a connecting end of the receiving antenna and a frequency-adjustable signal source used for active injection, wherein the directional coupler is provided with a front directional coupler and a rear directional coupler, the front directional coupler is provided with two detection ports which are respectively connected with a signal source and a load, the two detection ports of the rear directional coupler are respectively connected with an incident power detection circuit and a reflected power detection circuit, the connecting end of the receiving antenna is connected with an input port of the front directional coupler, an output port of the front directional coupler is connected with an input port of the rear directional coupler, an output port of the rear directional coupler is connected with the receiving antenna, and a signal of the signal source sequentially passes through the front directional coupler, the rear directional coupler and the receiving antenna.
Further, the front directional coupler comprises two transformers T1 and T2, one end of an input winding of the transformer T1 is connected with the connecting end of the receiver, the other end of the input winding of the transformer T1 is connected with one end of the rear directional coupler and one end of an output winding of the transformer T2 respectively, and the other end of the output winding of the transformer T2 is grounded; one end of an output winding of the T1 transformer is grounded, the other end of the output winding of the T1 transformer is respectively connected with a load input end and one end of an input winding of the T2 transformer, an output end of the load is grounded, and the other end of the input winding of the T2 transformer is connected with a signal source.
Further, the load is a resistor.
The use method of the receiving antenna standing wave ratio measuring system comprises the following steps,
step a, the signal source injects a frequency signal to be measured into a receiving antenna through a front directional coupler.
The utility model discloses a receiving antenna standing-wave ratio measurement system uses current through-type power meter principle as the basis, has guaranteed that receiver and receiving antenna are connected, and in the receiver use, the signal source initiative is injected into the through-type power circuit and is realized online real-time receiving antenna standing wave measuring function.
Drawings
Fig. 1 is a schematic diagram of an embodiment of a standing-wave ratio measuring system of a transmitting antenna according to the present invention;
fig. 2 is a circuit connection diagram of an embodiment of the standing-wave ratio measuring system of the transmitting antenna of the present invention;
fig. 3 is a schematic diagram of a conventional through-type power meter.
Detailed Description
The transmitting antenna standing wave ratio measuring system of the present invention is described in detail with reference to the following embodiments. The embodiment can be referred to in the embodiment of the receiving antenna standing-wave ratio measuring system. It should be known to those skilled in the art that the directional coupler is not limited to the transformer structure, and the directional coupler of the transformer structure is mainly used for short wave, ultrashort wave frequency, and the microwave frequency directional coupler is microstrip line structure, therefore, the present case is not right with the transformer structure directional coupler as an example the utility model discloses the restriction, the coupler that adopts other structures is the utility model discloses a protection scope.
Referring to fig. 1 and 2, a transmitting antenna standing-wave ratio measuring system includes a transmitting antenna with an adjustable oscillator, a directional coupler disposed between a transmitter connection end P1 and a transmitting antenna P6, and a second signal source P2 with an adjustable frequency, the directional coupler includes two parts, a and B, the directional coupler a includes two transformers, T1 and T2, one end of an input winding of the transformer T1 is connected to the transmitter connection end P1, the other end of the input winding of the transformer T1 is connected to one end of an output winding of the rear directional coupler and the transformer T2, and the other end of the output winding of the transformer T2 is grounded; one end of an output winding of the T1 transformer is grounded, the other end of the output winding of the T1 transformer is respectively connected with one end of an input winding of a resistor R1 and a T2 transformer which are used as loads, the resistor R1 is grounded, and the other end of the input winding of the T2 transformer is connected with a second signal source P2; the directional coupler B comprises two transformers T3 and T4, the connection mode of the two transformers T3 and T4 is the same as that of the prior art, and the main function is to obtain the incident power and the transmitting power of the radio frequency antenna and respectively supply the incident power and the transmitting power to ports P3 and P4 so as to obtain the standing-wave ratio by adopting a logarithmic amplifier.
When the transmitting antenna standing-wave ratio measuring system is used, when a transmitter cannot transmit power, in this embodiment, a user generates an arbitrary frequency point of 1MHz-30MHz by using a DDS signal generator chip AD9851, injects the arbitrary frequency point into the directional coupler a through a P2 port, and reflects incident and reflected power of the transmitting antenna at P3 and P4 ports connected to the directional coupler B after exciting the transmitting antenna by the injected signal;
when the transmitter can transmit power, the signal passes through the directional coupler B, the incident power and the reflected power of the transmitting antenna are respectively sent to the ports P3 and P4,
the antenna standing wave ratio of the transmitting signal at the frequency can be calculated by measuring the power signals on the P3 and the P4 by using a logarithmic amplifier AD 8306.
Claims (7)
1. A transmitting antenna standing-wave ratio measuring system comprises a transmitting antenna with an adjustable oscillator, a directional coupler arranged between a transmitter connecting end and the transmitting antenna and is characterized by further comprising a second signal source with adjustable frequency and used for active injection, the directional coupler is provided with a front directional coupler and a rear directional coupler, the front directional coupler is provided with two detection ports which are respectively connected with a second signal source and a load, the two detection ports of the rear directional coupler are respectively connected with an incident power detection circuit and a reflected power detection circuit, the transmitter connecting end is connected with an input port of the front directional coupler, an output port of the front directional coupler is connected with an input port of the rear directional coupler, an output port of the rear directional coupler is connected with the transmitting antenna, and signals of the second signal source sequentially pass through the front directional coupler, the rear directional coupler and the transmitting antenna to reach the transmitting antenna.
2. The transmitting antenna standing-wave ratio measuring system as claimed in claim 1, wherein the front directional coupler comprises two transformers T1 and T2, one end of an input winding of the T1 transformer is connected with the transmitter connection end, the other end of the input winding of the T1 transformer is respectively connected with one end of the rear directional coupler and one end of an output winding of the T2 transformer, and the other end of the output winding of the T2 transformer is grounded; one end of an output winding of the T1 transformer is grounded, the other end of the output winding of the T1 transformer is respectively connected with a load input end and one end of an input winding of the T2 transformer, an output end of the load is grounded, and the other end of the input winding of the T2 transformer is connected with a second signal source.
3. The transmit antenna standing wave ratio measurement system according to claim 1 or 2, wherein the load is a resistor.
4. The transmitting antenna standing-wave ratio measuring system as claimed in claim 1 or 2, wherein the rear directional coupler comprises two transformers T3 and T4, one end of an input winding of the transformer T3 is connected with the front directional coupler, the other end of the input winding of the transformer T3 is connected with the transmitting antenna and one end of an output winding of the transformer T4, respectively, and the other end of the output winding of the transformer T4 is grounded; one end of an output winding of the T3 transformer is grounded, the other end of the output winding of the T3 transformer is respectively connected with the incident power detection circuit and one end of an input winding of the T4 transformer, and the other end of the input winding of the T2 transformer reflects the power detection circuit.
5. A standing-wave ratio measuring system of a receiving antenna comprises the receiving antenna, a directional coupler arranged between a connecting end of the receiving antenna and is characterized by further comprising a frequency-adjustable signal source used for active injection, the directional coupler is provided with a front directional coupler and a rear directional coupler, the front directional coupler is provided with two detection ports which are respectively connected with a signal source and a load, the two detection ports of the rear directional coupler are respectively connected with an incident power detection circuit and a reflected power detection circuit, the connecting end of the receiving antenna is connected with an input port of the front directional coupler, an output port of the front directional coupler is connected with an input port of the rear directional coupler, an output port of the rear directional coupler is connected with the receiving antenna, and signals of the signal source sequentially pass through the front directional coupler, the rear directional coupler and the receiving antenna to reach the receiving antenna.
6. The receiving antenna standing-wave ratio measuring system as claimed in claim 5, wherein the front directional coupler comprises two transformers T1 and T2, one end of an input winding of the transformer T1 is connected to the receiver connection terminal, the other end of the input winding of the transformer T1 is connected to one end of the rear directional coupler and one end of an output winding of the transformer T2, respectively, and the other end of the output winding of the transformer T2 is grounded; one end of an output winding of the T1 transformer is grounded, the other end of the output winding of the T1 transformer is respectively connected with a load input end and one end of an input winding of the T2 transformer, an output end of the load is grounded, and the other end of the input winding of the T2 transformer is connected with a signal source.
7. A receiving antenna standing wave ratio measuring system according to claim 5 or 6, characterized in that the load is a resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120976260.8U CN214756369U (en) | 2021-05-10 | 2021-05-10 | Transmitting antenna and receiving antenna standing-wave ratio measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120976260.8U CN214756369U (en) | 2021-05-10 | 2021-05-10 | Transmitting antenna and receiving antenna standing-wave ratio measuring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214756369U true CN214756369U (en) | 2021-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120976260.8U Expired - Fee Related CN214756369U (en) | 2021-05-10 | 2021-05-10 | Transmitting antenna and receiving antenna standing-wave ratio measuring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214756369U (en) |
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2021
- 2021-05-10 CN CN202120976260.8U patent/CN214756369U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211116 |
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| CF01 | Termination of patent right due to non-payment of annual fee |