CN113630133A - Active ultra-wideband balance-unbalance transformer converter - Google Patents
Active ultra-wideband balance-unbalance transformer converter Download PDFInfo
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- H—ELECTRICITY
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- 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
- H04B1/02—Transmitters
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- H—ELECTRICITY
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- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
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- H—ELECTRICITY
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- 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
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Abstract
The invention discloses an active ultra-wideband balance-unbalance transformer converter, which comprises: a receive antenna connector electrically connected to the ultra-wideband antenna and configured to receive a differential balanced current carrying a transmission signal from the ultra-wideband antenna; an impedance matcher for matching impedance for the differential balanced current for the ultra-wideband antenna; a differential amplifier configured to receive the differential balance current from the impedance matcher and perform signal amplification; a filter configured to receive the amplified differential balance current from the differential amplifier and perform signal filtering; a high frequency transformer configured to receive the filtered differential balanced current from the filter and convert the differential balanced current to a single-ended unbalanced current; a feeder cable connector electrically connected to the coaxial feeder cable, configured to receive the single-ended unbalanced current from the high frequency transformer and transmit to the coaxial feeder cable. The invention can reduce insertion loss, improve bandwidth, improve current balance degree and realize impedance conversion and matching.
Description
Technical Field
The invention relates to the field of electromagnetic compatibility, in particular to an active ultra-wideband balun.
Background
In an EMC (electromagnetic compatibility) test of an electronic product, an ultra-wideband antenna needs to be applied to receive electromagnetic waves of each frequency band to complete the test. The current on the ultra-wideband antenna must be balanced current to avoid the unbalanced current from generating radiation and system interference on the antenna feeder; at the same time, the shield of the coaxial cable applied to the antenna feed is grounded, so the current in the cable is a single-ended unbalanced current. Therefore, an ultra-wideband balun (also called balun in some technical documents) needs to be added between the feeder and the ultra-wideband antenna to realize the ultra-wideband balun. Meanwhile, in order to reduce the insertion loss of the system, the two ends of the balun need to be respectively matched with the feeder line and the ultra-wideband antenna in impedance.
The prior applied balun transformer technology is mainly realized by passive methods including microstrip lines or sleeves, graduations, high-frequency transformers and the like.
The balun based on the microstrip line or the sleeve mainly forces the external current of the transmission line to be zero by adjusting the external feedback structure of the transmission line to be one fourth of the wavelength, thereby realizing forced balance-unbalance conversion. The method has the advantages of limited bandwidth, large insertion loss and difficult adjustment of matched impedance.
The balun based on the gradient line realizes smooth transition and impedance conversion from an unbalanced terminal to a balanced terminal by designing a transition curve. According to the method, if the transition curve is smooth enough, the ultra-wideband function can be well realized. However, due to the size limitation of the balun, the curve smoothness is limited, which results in large insertion loss of the balun and difficulty in adjusting the matching impedance.
A balun transformer based on a high frequency transformer (e.g., TCM4-452X + from Mini Circuits) uses a small-sized coil to perform balun transformation and impedance transformation in a high frequency band based on the transformer principle. The method brings insertion loss to the system, the low-frequency bandwidth is limited, and the matching impedance is difficult to adjust.
Aiming at the problems of large insertion loss, low bandwidth, unbalanced current and difficult adjustment of matched impedance of various balanced-unbalanced voltage transformers in the prior art, no effective solution is available at present.
Disclosure of Invention
In view of this, an embodiment of the present invention provides an active ultra-wideband balun, which can reduce insertion loss, improve bandwidth, improve current balance, and implement impedance conversion and matching, thereby improving performance of an EMC test system.
In view of the above object, a first aspect of embodiments of the present invention provides an active ultra-wideband balun, comprising:
a receive antenna connector electrically connected to the ultra-wideband antenna and configured to receive a differential balanced current carrying a transmission signal from the ultra-wideband antenna;
an impedance matcher, electrically connected to the receiving antenna connector, configured to match impedances for the differential balanced current for the ultra-wideband antenna;
a differential amplifier electrically connected to the impedance matcher, configured to receive the differential balancing current from the impedance matcher and perform signal amplification;
the filter is electrically connected to the differential amplifier and is configured to receive the amplified differential balance current from the differential amplifier and filter signals;
a high frequency transformer electrically connected to the filter and configured to receive the filtered differential balanced current from the filter and convert the differential balanced current into a single-ended unbalanced current;
a feeder cable connector electrically connected to the high frequency transformer and the coaxial feeder cable, configured to receive the single-ended unbalanced current from the high frequency transformer and transmit to the coaxial feeder cable.
In some embodiments, the impedance matcher includes a pair of resistors connected in series on a circuit in which the differential balancing currents are located; the impedance matcher is configured to match impedances for the differential balanced current by adjusting resistance values of the resistor pairs.
In some embodiments, the impedance matcher is configured to match impedances for the differential balanced currents by adjusting resistance values of the resistor pairs based on a matching resistance of the ultra-wideband antenna and a differential internal resistance of the differential amplifier.
In some embodiments, the balun further comprises:
and the power supply is electrically connected to the differential amplifier and is configured for supplying power to the differential amplifier.
In some embodiments, the differential amplifier is an LMH3401 chip, operating with a voltage of ± 2.5V and a current of 60mA supplied by a power supply.
A second aspect of an embodiment of the present invention provides another active ultra-wideband balun, including:
a feeder cable connector electrically connected to the coaxial feeder cable, configured to receive a single-ended unbalanced current carrying a transmission signal from the coaxial feeder cable;
a differential amplifier electrically connected to the feeder cable connector, configured to receive the single-ended unbalanced current from the feeder cable connector, convert the single-ended unbalanced current into a differential balanced current, and perform signal amplification;
an impedance matcher, electrically connected to the differential amplifier, configured to match impedances for the differential balanced current for the ultra-wideband antenna;
and the transmitting antenna connector is electrically connected to the impedance matcher and the ultra-wideband antenna, and is configured to receive the differential balanced current from the impedance matcher and transmit the differential balanced current to the ultra-wideband antenna.
In some embodiments, the impedance matcher includes a pair of resistors connected in series on a circuit in which the differential balancing currents are located; the impedance matcher is configured to match impedances for the differential balanced current by adjusting resistance values of the resistor pairs.
In some embodiments, the impedance matcher matches the impedance for the differential balancing current by adjusting resistance values of the resistor pair based on a matching resistance of the ultra-wideband antenna and a differential internal resistance of the differential amplifier.
In some embodiments, the balun further comprises:
and the power supply is electrically connected to the differential amplifier and is configured for supplying power to the differential amplifier.
In some embodiments, the differential amplifier is an LMH3401 chip, operating with a voltage of ± 2.5V and a current of 60mA supplied by a power supply.
The invention has the following beneficial technical effects: the active ultra-wideband balance-unbalance transformer converter provided by the embodiment of the invention comprises two types: a method for receiving a differential balanced current carrying a transmitted signal from an ultra-wideband antenna using a receive antenna connector electrically connected to the ultra-wideband antenna; the impedance matcher is electrically connected to the receiving antenna connector and is used for matching impedance for the differential balance current aiming at the ultra-wideband antenna; a differential amplifier electrically connected to the impedance matcher, receiving the differential balanced current from the impedance matcher, and performing signal amplification; the filter is electrically connected to the differential amplifier, receives the differential balance current from the differential amplifier and performs signal filtering; the high-frequency transformer is electrically connected to the filter, receives the differential balanced current from the filter and converts the differential balanced current into single-ended unbalanced current; and the feeder cable connector is electrically connected to the high-frequency transformer and the coaxial feeder cable, receives the single-ended unbalanced current from the high-frequency transformer and transmits the single-ended unbalanced current to the coaxial feeder cable. A feeder cable connector electrically connected to a coaxial feeder cable configured to receive a single-ended unbalanced current carrying a transmission signal from the coaxial feeder cable; a differential amplifier electrically connected to the feeder cable connector, configured to receive the single-ended unbalanced current from the feeder cable connector, convert the single-ended unbalanced current into a differential balanced current, and perform signal amplification; an impedance matcher, electrically connected to the differential amplifier, configured to match impedances for the differential balanced current for the ultra-wideband antenna; and the transmitting antenna connector is electrically connected to the impedance matcher and the ultra-wideband antenna, and is configured to receive the differential balanced current from the impedance matcher and transmit the differential balanced current to the ultra-wideband antenna. The invention effectively reduces the insertion loss of the system and brings extra gain to the system; meanwhile, the ultra-wideband antenna has good ultra-wideband characteristics, especially the bandwidth in a low frequency band; the impedance matching can be conveniently carried out by changing the resistance of the differential end and the antenna; the sensitivity and the test frequency range of the EMC test system are effectively improved, and the EMC test performance is enhanced.
The technical scheme of the invention can better ensure the signal integrity, and because the active amplifier is used, the signal passing through the balun is larger than the amplitude of the excitation signal of the vector analyzer, so that the insertion loss problem of the balun is solved, extra gain can be brought to the system, and the advantages of the balun in comparison with other types are outstanding. The balun has an ultra-wideband characteristic from low frequency to high frequency, particularly a low frequency band, can be conveniently subjected to impedance matching with an antenna by changing the resistance of the differential end, and has outstanding advantages.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a first embodiment of an active ultra-wideband balun transformer provided in the present invention;
fig. 2 is a schematic circuit diagram of a first embodiment of an active ultra-wideband balun transformer provided in accordance with the present invention;
fig. 3 is a schematic structural diagram of a second embodiment of an active ultra-wideband balun transformer provided in the present invention;
fig. 4 is a schematic circuit diagram of a second embodiment of an active ultra-wideband balun transformer provided in accordance with the present invention;
fig. 5 is a schematic circuit diagram of a differential amplifier of an active ultra-wideband balun provided by the present invention;
fig. 6 is a printed circuit board diagram of a first embodiment of an active ultra-wideband balun transformer provided in accordance with the present invention;
fig. 7 is a printed circuit board diagram of a second embodiment of an active ultra-wideband balun transformer provided in accordance with the present invention;
fig. 8 is a time domain characteristic diagram of an active ultra-wideband balun transformer provided by the present invention in a connection test;
fig. 9 is a frequency domain characteristic diagram of the active ultra-wideband balun transformer provided by the invention in a connection test.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention are described in further detail with reference to the accompanying drawings.
It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it should be noted that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, and they are not described in any more detail in the following embodiments.
In view of the above objects, a first aspect of an embodiment of the present invention provides an embodiment of an active ultra-wideband balun. Fig. 1 is a schematic structural diagram of a first embodiment of an active ultra-wideband balun provided by the present invention.
The active ultra-wideband balun transformer, as shown in fig. 1, includes:
a receive antenna connector electrically connected to the ultra-wideband antenna and configured to receive a differential balanced current carrying a transmission signal from the ultra-wideband antenna;
an impedance matcher, electrically connected to the receiving antenna connector, configured to match impedances for the differential balanced current for the ultra-wideband antenna;
a differential amplifier electrically connected to the impedance matcher, configured to receive the differential balancing current from the impedance matcher and perform signal amplification;
the filter is electrically connected to the differential amplifier and is configured to receive the amplified differential balance current from the differential amplifier and filter signals;
a high frequency transformer electrically connected to the filter and configured to receive the filtered differential balanced current from the filter and convert the differential balanced current into a single-ended unbalanced current;
a feeder cable connector electrically connected to the high frequency transformer and the coaxial feeder cable, configured to receive the single-ended unbalanced current from the high frequency transformer and transmit to the coaxial feeder cable.
The apparatuses and devices disclosed in the embodiments of the present invention may be various electronic terminal devices, such as a mobile phone, a Personal Digital Assistant (PDA), a tablet computer (PAD), a smart television, and the like, or may be a large terminal device, such as a server, and therefore the scope of protection disclosed in the embodiments of the present invention should not be limited to a specific type of apparatus and device. The client disclosed in the embodiment of the present invention may be applied to any one of the above electronic terminal devices in the form of electronic hardware, computer software, or a combination of both.
In some embodiments, the impedance matcher includes a pair of resistors connected in series on a circuit in which the differential balancing currents are located; the impedance matcher is configured to match impedances for the differential balanced current by adjusting resistance values of the resistor pairs.
In some embodiments, the impedance matcher is configured to match impedances for the differential balanced currents by adjusting resistance values of the resistor pairs based on a matching resistance of the ultra-wideband antenna and a differential internal resistance of the differential amplifier.
In some embodiments, the balun further includes a power supply electrically connected to the differential amplifier and configured to power the differential amplifier.
In some embodiments, the differential amplifier is an LMH3401 chip, operating with a voltage of ± 2.5V and a current of 60mA supplied by a power supply.
The following further illustrates embodiments of the invention in accordance with the specific example shown in fig. 2. The full differential amplifier chip LM3401 needs +/-2.5v and 60mA power supplies, the power consumption is 3mW, and decoupling capacitors with different working frequencies are arranged on the periphery of the power supplies to ensure the stability of the power supplies. The antenna is connected with the differential Input ends Input1 and Input2 at two ends, and impedance matching can be carried out on the antenna by adjusting the Input end resistors R4 and R5. In this embodiment, the two resistance values are set to be 115 ohms to realize 230 ohms of differential resistance, and 250 ohms of matching resistance with the antenna can be realized by adding 20 ohms of differential resistance inside the chip. In design, R4 and R5 can be adjusted to realize broadband impedance matching with different resistance values according to different antennas. The output end of the fully differential amplifier chip enters a high-frequency transformer U2 after being filtered by RC, and is connected with an antenna feeder cable after being converted into a single-ended signal, so that balanced and unbalanced conversion is realized.
As can be seen from the foregoing embodiments, the active ultra-wideband balun provided in the embodiments of the present invention is electrically connected to an ultra-wideband antenna by using a receiving antenna connector, and receives a differential balanced current carrying a transmission signal from the ultra-wideband antenna; the impedance matcher is electrically connected to the receiving antenna connector and is used for matching impedance for the differential balance current aiming at the ultra-wideband antenna; a differential amplifier electrically connected to the impedance matcher, receiving the differential balanced current from the impedance matcher, and performing signal amplification; the filter is electrically connected to the differential amplifier, receives the differential balance current from the differential amplifier and performs signal filtering; the high-frequency transformer is electrically connected to the filter, receives the differential balanced current from the filter and converts the differential balanced current into single-ended unbalanced current; the feeder cable connector is electrically connected to the high-frequency transformer and the coaxial feeder cable, receives single-ended unbalanced current from the high-frequency transformer and transmits the single-ended unbalanced current to the coaxial feeder cable, and can reduce insertion loss, improve bandwidth, improve current balance degree, realize impedance conversion and matching, and accordingly improve EMC test system performance.
The technical scheme of the invention can better ensure the signal integrity, and because the active amplifier is used, the signal passing through the balun is larger than the amplitude of the excitation signal of the vector analyzer, so that the insertion loss problem of the balun is solved, extra gain can be brought to the system, and the advantages of the balun in comparison with other types are outstanding. The balun has an ultra-wideband characteristic from low frequency to high frequency, particularly a low frequency band, can be conveniently subjected to impedance matching with an antenna by changing the resistance of the differential end, and has outstanding advantages.
In view of the above objects, a second aspect of the embodiments of the present invention provides another embodiment of an active ultra-wideband balun. Fig. 3 is a schematic structural diagram of a second embodiment of the active ultra-wideband balun provided by the present invention.
As shown in fig. 3, the active ultra-wideband balun includes:
a feeder cable connector electrically connected to the coaxial feeder cable, configured to receive a single-ended unbalanced current carrying a transmission signal from the coaxial feeder cable;
a differential amplifier electrically connected to the feeder cable connector, configured to receive the single-ended unbalanced current from the feeder cable connector, convert the single-ended unbalanced current into a differential balanced current, and perform signal amplification;
an impedance matcher, electrically connected to the differential amplifier, configured to match impedances for the differential balanced current for the ultra-wideband antenna;
and the transmitting antenna connector is electrically connected to the impedance matcher and the ultra-wideband antenna, and is configured to receive the differential balanced current from the impedance matcher and transmit the differential balanced current to the ultra-wideband antenna.
In some embodiments, the impedance matcher includes a pair of resistors connected in series on a circuit in which the differential balancing currents are located; the impedance matcher is configured to match impedances for the differential balanced current by adjusting resistance values of the resistor pairs.
In some embodiments, the impedance matcher is configured to match impedances for the differential balanced currents by adjusting resistance values of the resistor pairs based on a matching resistance of the ultra-wideband antenna and a differential internal resistance of the differential amplifier.
In some embodiments, the balun further includes a power supply electrically connected to the differential amplifier and configured to power the differential amplifier.
In some embodiments, the differential amplifier is an LMH3401 chip, operating with a voltage of ± 2.5V and a current of 60mA supplied by a power supply.
The following further illustrates an embodiment of the present invention in accordance with the embodiment shown in fig. 4. Fig. 4 is substantially similar to fig. 2, but fig. 4 swaps the inputs and outputs with respect to fig. 2, and removes unnecessary filters and high frequency transformers. Specifically, the antenna is connected to the differential Output terminals Output1 and Output2, the single-ended feed line is connected to the amplifier input terminal, and impedance matching with the antenna can be performed by adjusting the Output terminal resistors R1 and R2.
As can be seen from the foregoing embodiments, the active ultra-wideband balun transformer provided in the embodiments of the present invention is electrically connected to the coaxial feeder cable by using the feeder cable connector, and receives a single-ended unbalanced current carrying a transmission signal from the coaxial feeder cable; a differential amplifier electrically connected to the feeder cable connector, receiving the single-ended unbalanced current from the feeder cable connector, converting the single-ended unbalanced current into a differential balanced current, and performing signal amplification; the impedance matcher is electrically connected to the differential amplifier and used for matching impedance for differential balanced current aiming at the ultra-wideband antenna; the transmitting antenna connector is electrically connected to the impedance matcher and the ultra-wideband antenna, receives differential balance current from the impedance matcher and transmits the differential balance current to the ultra-wideband antenna, so that insertion loss can be reduced, bandwidth can be increased, current balance degree can be increased, impedance conversion and matching can be realized, and the performance of an EMC test system can be improved.
The technical scheme of the invention can better ensure the signal integrity, and because the active amplifier is used, the signal passing through the balun is larger than the amplitude of the excitation signal of the vector analyzer, so that the insertion loss problem of the balun is solved, extra gain can be brought to the system, and the advantages of the balun in comparison with other types are outstanding. The balun has an ultra-wideband characteristic from low frequency to high frequency, particularly a low frequency band, can be conveniently subjected to impedance matching with an antenna by changing the resistance of the differential end, and has outstanding advantages.
The fully differential amplifier chips used in the two embodiments are both LM3401, and the internal equivalent circuit thereof can be seen in fig. 5. In addition, fig. 6 and 7 show the printed wiring board wiring patterns of the first and second embodiments, respectively, in which the printed wiring board employs a FR4 board material 1mm thick, and the impedances of microstrip lines connecting the antenna and the feeder line match the impedances of the antenna and the feeder line, respectively, and the microstrip lines are connected with a taper line to reduce signal loss when connecting devices of no width. The power module is far away from the high-frequency signal area, and meanwhile, shielding through holes are formed in the periphery of the high-frequency signal area, so that the noise influence caused by power supply ripples is reduced.
The embodiment of the invention tests the balun by using the vector analyzer to verify the technical effect which can be achieved. The differential ends of the transmitting and receiving balun are connected for testing, so that the time domain characteristic of the balun as shown in fig. 8 can be obtained, the design of the balun can better ensure the signal integrity, and the signal passing through the balun is larger than the amplitude of an excitation signal of a vector analyzer due to the use of an active amplifier, so that the insertion loss problem of the balun is solved, extra gain can be brought to a system, and the balun has outstanding advantages compared with other types of baluns; and as shown in fig. 9, the frequency domain characteristic of the balun transformer, which has an ultra-wideband characteristic from a low frequency to a high frequency, especially a low frequency band, is advantageous in that it can be easily impedance-matched with an antenna by changing the differential terminal resistance.
Therefore, compared with other types of balun designs, the design of the embodiment of the invention adopts the fully differential active amplifier to effectively reduce the insertion loss of the system and bring extra gain to the system. Meanwhile, the ultra-wideband antenna has good ultra-wideband characteristics, especially low-frequency band bandwidth. Meanwhile, the invention can conveniently carry out impedance matching with the antenna by changing the resistance of the differential end. The designed balance-unbalance transformer converter can effectively improve the sensitivity and the test frequency range of an EMC test system and enhance the EMC test performance.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, of embodiments of the invention is limited to these examples; within the idea of an embodiment of the invention, also technical features in the above embodiment or in different embodiments may be combined and there are many other variations of the different aspects of an embodiment of the invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of the embodiments of the present invention are intended to be included within the scope of the embodiments of the present invention.
Claims (10)
1. An active ultra-wideband balun, comprising:
a receive antenna connector electrically connected to the ultra-wideband antenna and configured to receive a differential balanced current carrying a transmission signal from the ultra-wideband antenna;
an impedance matcher, electrically connected to the receive antenna connector, configured to match an impedance for the differential balanced current for an ultra-wideband antenna;
a differential amplifier electrically connected to the impedance matcher, configured to receive the differential balancing current from the impedance matcher and perform signal amplification;
a filter electrically connected to the differential amplifier, configured to receive the amplified differential balanced current from the differential amplifier and perform signal filtering;
a high frequency transformer electrically connected to the filter and configured to receive the filtered differential balanced current from the filter and convert the differential balanced current into a single-ended unbalanced current;
a feeder cable connector electrically connected to the high frequency transformer and a coaxial feeder cable, configured to receive the single-ended unbalanced current from the high frequency transformer and transmit to the coaxial feeder cable.
2. The balun of claim 1, wherein the impedance matcher comprises a pair of resistors connected in series on a circuit on which the differential balancing currents are located; the impedance matcher is configured to match impedances for the differential balanced current by adjusting resistance values of the resistor pairs.
3. The balun of claim 2, wherein the impedance matcher is configured for matching an impedance for the differential balanced current by adjusting resistance values of the resistor pair based on a matching resistance of an ultra-wideband antenna and a differential internal resistance of the differential amplifier.
4. The balun of claim 1, further comprising:
a power supply electrically connected to the differential amplifier configured to supply power to the differential amplifier.
5. An active ultra-wideband balun, comprising:
a feeder cable connector electrically connected to the coaxial feeder cable, configured to receive a single-ended unbalanced current carrying a transmission signal from the coaxial feeder cable;
a differential amplifier electrically connected to the feeder cable connector and configured to receive the single-ended unbalanced current from the feeder cable connector, convert the single-ended unbalanced current into a differential balanced current, and perform signal amplification;
an impedance matcher, electrically connected to the differential amplifier, configured to match impedances for the differential balanced current for an ultra-wideband antenna;
and the transmitting antenna connector is electrically connected to the impedance matcher and the ultra-wideband antenna, and is configured to receive the differential balancing current from the impedance matcher and transmit the differential balancing current to the ultra-wideband antenna.
6. The balun of claim 5, wherein the impedance matcher comprises a pair of resistors connected in series on a circuit on which the differential balancing currents are located; the impedance matcher is configured to match impedances for the differential balanced current by adjusting resistance values of the resistor pairs.
7. The balun of claim 6, wherein the impedance matcher is configured for matching an impedance for the differential balanced current by adjusting resistance values of the resistor pair based on a matching resistance of an ultra-wideband antenna and a differential internal resistance of the differential amplifier.
8. The balun of claim 5, further comprising:
a power supply electrically connected to the differential amplifier configured to supply power to the differential amplifier.
9. An electromagnetic compatibility test system, comprising:
a receiving antenna, a transmitting antenna, and a coaxial feeder;
at least one first balun connected to said receive antenna and said coaxial feed line and as claimed in any one of claims 1 to 4;
at least one second balun connected to said transmitting antenna and said coaxial feed line and as claimed in any one of claims 5 to 8;
a memory, at least one processor, and a test program stored on the memory and executable on the processor, wherein the processor performs an electromagnetic compatibility test by using the first balun and the second balun when executing the test program.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a test program of claim 9, which when executed by the computer performs an electromagnetic compatibility test using at least one first balun of any one of claims 1-4 and at least one second balun of any one of claims 5-8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110807363.6A CN113630133A (en) | 2021-07-16 | 2021-07-16 | Active ultra-wideband balance-unbalance transformer converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110807363.6A CN113630133A (en) | 2021-07-16 | 2021-07-16 | Active ultra-wideband balance-unbalance transformer converter |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1625844A (en) * | 2002-01-31 | 2005-06-08 | 皇家飞利浦电子股份有限公司 | Transmitter and/or receiver module |
| US20130314288A1 (en) * | 2012-05-24 | 2013-11-28 | Raytheon Company | Differential High Power Amplifier for a Low Profile, Wide Band Transmit Array |
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2021
- 2021-07-16 CN CN202110807363.6A patent/CN113630133A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1625844A (en) * | 2002-01-31 | 2005-06-08 | 皇家飞利浦电子股份有限公司 | Transmitter and/or receiver module |
| US20130314288A1 (en) * | 2012-05-24 | 2013-11-28 | Raytheon Company | Differential High Power Amplifier for a Low Profile, Wide Band Transmit Array |
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Application publication date: 20211109 |
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| RJ01 | Rejection of invention patent application after publication |