阅读说明：本技术 射频功率合成自适应调节方法 (Radio frequency power synthesis self-adaptive adjusting method ) 是由 张军 黄耀明 李宁春 闭涛 覃晖 黄瑶 于 2020-05-25 设计创作，主要内容包括：射频功率合成自适应调节方法,包括：获取功率合成模块各输入信号功率；将功率合成模块各输入信号功率调至相等；获取功率合成模块中各吸收负载功率；将吸收负载功率调至最小,同时保持功率合成模块各输入信号功率相等；获取功率合成模块输出功率。上述射频功率合成自适应调节方法,使得功率合成电路在工作频段内的任意频点以及电路模块更换时能够通过软件操作自动调整功率合成参数,获得功率合成最优输出,解决了现有技术中当输入频率变化、电路模块更换时,功率合成参数不能自动调整的问题。(The radio frequency power synthesis self-adaptive adjusting method comprises the following steps: acquiring the power of each input signal of the power synthesis module; adjusting the power of each input signal of the power synthesis module to be equal; acquiring the power of each absorption load in the power synthesis module; adjusting the power of the absorbed load to be minimum, and simultaneously keeping the power of each input signal of the power synthesis module equal; and acquiring the output power of the power synthesis module. The radio frequency power synthesis self-adaptive adjusting method enables the power synthesis parameters to be automatically adjusted through software operation when the power synthesis circuit is replaced at any frequency point in a working frequency band, so that the optimal power synthesis output is obtained, and the problem that the power synthesis parameters cannot be automatically adjusted when the input frequency changes and the circuit module is replaced in the prior art is solved.)

1. The radio frequency power synthesis self-adaptive adjusting method comprises the following steps:

acquiring the power of each input signal of the power synthesis module;

adjusting the power of each input signal of the power synthesis module to be equal;

acquiring the power of each absorption load in the power synthesis module;

adjusting the power of the absorbed load to be minimum, and simultaneously keeping the power of each input signal of the power synthesis module equal;

and acquiring the output power of the power synthesis module.

2. The radio frequency power synthesis adaptive adjustment method according to claim 1, wherein the obtaining of the power of each input signal of the power synthesis module specifically comprises:

the power of each input signal of the power synthesis module is detected by a power meter or other power measuring instruments and is transmitted to a single chip microcomputer or other programmable chips.

3. The radio frequency power synthesis adaptive adjustment method according to claim 1, wherein the adjusting the power of each input signal of the power synthesis module to be equal specifically comprises:

the power distribution signal size or the power amplifier gain is automatically adjusted through a single chip microcomputer or other programmable chips, so that the power of each input signal of the power synthesis module is equal.

4. The radio frequency power synthesis adaptive adjustment method according to claim 1, wherein the absorption load is an isolation resistor or a matching resistor between each two signals of the power synthesis module.

5. The radio frequency power synthesis adaptive adjustment method according to claim 1, wherein the obtaining of each absorbed load power in the power synthesis module specifically comprises:

the power of each absorbed load is detected by a power meter or other power measuring instruments and is transmitted to a singlechip or other programmable chips.

6. The radio frequency power synthesis adaptive adjustment method according to claim 1, wherein the adjusting the absorbed load power to the minimum while keeping the power of each input signal of the power synthesis module equal specifically comprises:

the phase and power of each input signal of the power synthesis module are automatically adjusted through a single chip microcomputer or other programmable chips, so that the absorbed load power is minimum, and meanwhile, the power of each input signal of the power synthesis module is kept equal.

7. The radio frequency power synthesis adaptive adjustment method according to claim 1, wherein the obtaining of the output power of the power synthesis module specifically comprises:

the output power of the power synthesis module is detected by a power meter or other power measuring instruments and is transmitted to a single chip microcomputer or other programmable chips.

Technical Field

The invention relates to the field of radio frequency power synthesis, in particular to a radio frequency power synthesis self-adaptive adjusting method.

Background

When the radio frequency signal is power-amplified, when a single power amplifier module cannot achieve the required output power, a plurality of power amplifier modules need to be power-synthesized to achieve sufficient power output. The power synthesis circuit mainly comprises three parts: the power synthesis device comprises a power distribution module, a power amplifier module and a power synthesis module. The input radio frequency signals are divided into multiple paths of radio frequency signals through the power distribution module, then each path of radio frequency signal is amplified through the plurality of power amplification modules, and then vector superposition is carried out through the power synthesis module to obtain larger total power. The power combining efficiency is crucial to the total power output impact. Therefore, the power combining circuit must select appropriate power combining parameters to obtain optimal combining efficiency.

In the existing power synthesis circuit, a professional radio frequency engineer uses a professional instrument to debug each module before leaving a factory, and then synthesis joint debugging is performed, which takes several hours to obtain optimal output of power synthesis. If a certain power amplifier module is damaged and needs to be replaced in actual use, a professional radio frequency engineer is required to carry a special instrument to the site to debug the power synthesis parameters again so as to achieve the optimal synthesis efficiency.

The above-mentioned method for manually debugging the power combining circuit has at least the following problems.

When the power synthesis circuit is debugged before leaving a factory, the power synthesis optimal output can be obtained only at a certain working frequency point, and because the working characteristics of circuit components and parts under different frequencies are different, in the working frequency band of the power synthesis circuit, if the frequency of an input radio frequency signal is changed, the power synthesis efficiency can be changed, and the condition that all frequency points in the working frequency band can not obtain the power synthesis optimal output can not be met.

When a certain circuit module is damaged and needs to be replaced, a professional radio frequency engineer is required to carry a special instrument to the site to debug the power synthesis parameters again so as to achieve the optimal synthesis efficiency, the technical level required by a debugger is higher, and the consumed time is longer. In the field or remote areas, the traffic is inconvenient, the local maintainers have limited technology, and a professional radio frequency engineer needs to rush to the field from other places, so that the rapid maintenance of the equipment is greatly restricted.

Disclosure of Invention

The radio frequency power synthesis self-adaptive adjusting method provided by the invention can automatically adjust the power synthesis parameters through software operation when the power synthesis circuit is replaced at any frequency point in a working frequency band, so as to obtain the optimal output of power synthesis, and solve the problem that the power synthesis parameters can not be automatically adjusted when the input frequency is changed and the circuit module is replaced in the prior art.

The invention provides a radio frequency power synthesis self-adaptive adjusting method, which comprises the following steps:

acquiring the power of each input signal of the power synthesis module;

adjusting the power of each input signal of the power synthesis module to be equal;

acquiring the power of each absorption load in the power synthesis module;

adjusting the power of the absorbed load to be minimum, and simultaneously keeping the power of each input signal of the power synthesis module equal;

and acquiring the output power of the power synthesis module.

The technical scheme provided by the invention has the beneficial effects that:

the power synthesis circuit automatically adjusts the power synthesis parameters through software operation to obtain the optimal power synthesis output, only takes several minutes, is quick, simple and convenient, does not need to configure a professional instrument, greatly shortens the time for debugging the power synthesis circuit, and reduces the technical requirements on debugging personnel.

Drawings

Fig. 1 is a flow chart of the radio frequency power synthesis adaptive adjustment method of the present invention.

Detailed Description

The radio frequency power synthesis adaptive adjustment method provided by the invention will be described in detail through embodiments with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The flow chart of the radio frequency power synthesis adaptive adjusting method provided by the invention is shown in figure 1.

Step S101, acquiring power of each input signal of the power synthesis module.

The power of each input signal of the power combining module can be detected by a power meter or other power measuring instruments. For example, a pass-through digital power meter is installed at the input end of the power synthesis module, and the power value of each input signal is transmitted to a single chip microcomputer or other programmable chips.

Step S102, the power of each input signal of the power synthesis module is adjusted to be equal.

The power distribution signal size or the power amplifier gain can be automatically adjusted through the single chip microcomputer or other programmable chips, so that the power of each input signal of the power synthesis module is equal.

Step S103, acquiring each absorption load power in the power synthesis module.

The power of each absorption load in the power synthesis module can be detected through a power meter or other power measuring instruments, and the absorption load is an isolation resistor or a matching resistor between every two paths of signals of the power synthesis module. For example, a through-type digital power meter is installed at the absorption load, and the power value of each absorption load is transmitted to a single chip microcomputer or other programmable chips.

And step S104, adjusting the absorbed load power to the minimum, and simultaneously keeping the power of each input signal of the power synthesis module equal.

The phase and power of each input signal of the power synthesis module can be automatically adjusted through a single chip microcomputer or other programmable chips, so that the absorbed load power is minimum, and meanwhile, the power of each input signal of the power synthesis module is kept equal. The phase of each input signal of the power synthesis module can be adjusted through a digital phase adjusting circuit in the power distribution module. Taking the power synthesis module to synthesize four paths of radio frequency signals RF through the three-level directional coupler as an example₁、RF₂、RF₃、RF₄When power synthesis is carried out, after the output powers of the four power amplification modules are adjusted to be consistent, signals RF are firstly input₁、RF₂Synthesizing into RF₁₂Detecting whether the power of the absorbing load one is minimum or not by adjusting the phase of the first or the second signal, and then applying the RF₁₂And RF₃Synthesizing into RF₁₂₃Detecting whether the power of the second absorption load is minimum or not by adjusting the phase of the third signal, and finally, carrying out RF₁₂₃And RF₄And synthesizing, and detecting whether the power of the third absorption load is minimum or not by adjusting the phase of the fourth path signal. Due to the fact that when adjusting the phase, the phaseThe output power of the power amplifier changes, so that the size of the power distribution signal or the gain of the power amplifier needs to be adjusted jointly while the phase is adjusted, and the power output of the four power amplifiers is kept consistent.

And step S105, acquiring the output power of the power synthesis module.

The power combining module output power may be detected by a power meter or other power measuring instrument. For example, a pass-through digital power meter is installed at the output end of the power synthesis module, and the output power value is transmitted to a single chip microcomputer or other programmable chips.

The above examples are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.