阅读说明：本技术 线性限幅器 (Linear limiter ) 是由 邓世雄 陈书宾 孙计永 赵瑞华 宋学峰 王凯 李丰 袁彪 于 2019-10-31 设计创作，主要内容包括：本发明适用于电子器件技术领域,提供了一种线性限幅器,包括：第一隔离模块、第一限幅模块、第二限幅模块和第二隔离模块；第一限幅模块包括第一限幅电路和第二限幅电路,第二限幅模块包括第三限幅电路和第四限幅电路；各个限幅电路分别包括至少两个二极管单元。第一隔离模块的第一端为限幅输入端,第一隔离模块的第二端分别与第一限幅模块的第一端、第二限幅模块的第一端及第二隔离模块的第一端连接,第二隔离模块的第二端为限幅输出端。本申请通过第一限幅模块和第二限幅模块中并联多个二极管单元,能够降低二极管结电容,增加二极管数量,从而提高限幅器的耐功率能力,进而提高线性限幅器的可靠性。(The invention is suitable for the technical field of electronic devices, and provides a linear amplitude limiter, which comprises: the device comprises a first isolation module, a first amplitude limiting module, a second amplitude limiting module and a second isolation module; the first amplitude limiting module comprises a first amplitude limiting circuit and a second amplitude limiting circuit, and the second amplitude limiting module comprises a third amplitude limiting circuit and a fourth amplitude limiting circuit; each clipping circuit comprises at least two diode units. The first end of the first isolation module is an amplitude limiting input end, the second end of the first isolation module is respectively connected with the first end of the first amplitude limiting module, the first end of the second amplitude limiting module and the first end of the second isolation module, and the second end of the second isolation module is an amplitude limiting output end. This application can reduce diode junction electric capacity through parallelly connected a plurality of diode units in first amplitude limiting module and the second amplitude limiting module, increases diode quantity to improve the power-tolerant ability of amplitude limiter, and then improve the reliability of linear amplitude limiter.)

1. A linear limiter, comprising: the device comprises a first isolation module, a first amplitude limiting module, a second amplitude limiting module and a second isolation module;

the first amplitude limiting module comprises a first amplitude limiting circuit and a second amplitude limiting circuit, and the second amplitude limiting module comprises a third amplitude limiting circuit and a fourth amplitude limiting circuit; the first amplitude limiting circuit, the second amplitude limiting circuit, the third amplitude limiting circuit and the fourth amplitude limiting circuit respectively comprise at least two diode units;

the first end of the first isolation module is an amplitude limiting input end, the second end of the first isolation module is respectively connected with the first end of the first amplitude limiting module, the first end of the second amplitude limiting module and the first end of the second isolation module, and the second end of the second isolation module is an amplitude limiting output end;

the anodes of the diode units of the first amplitude limiting circuit and the cathodes of the diode units of the second amplitude limiting circuit are respectively connected with the first end of the first amplitude limiting module, and the anodes of the diode units of the third amplitude limiting circuit and the cathodes of the diode units of the fourth amplitude limiting circuit are respectively connected with the first end of the second amplitude limiting module; the cathode of each diode unit of the first amplitude limiting circuit, the anode of each diode unit of the second amplitude limiting circuit, the cathode of each diode unit of the third amplitude limiting circuit and the anode of each diode unit of the fourth amplitude limiting circuit are respectively grounded.

2. The linear limiter of claim 1, wherein the linear limiter further comprises an input matching circuit and an output matching circuit;

the first end of the input matching circuit is connected with the second end of the first isolation module, and the second end of the input matching circuit is connected with the first end of the first amplitude limiting module;

and the first end of the output matching circuit is connected with the first end of the second amplitude limiting module, and the second end of the output matching circuit is connected with the first end of the second isolation module.

3. The linear limiter according to claim 1, wherein the first diode unit includes at least two diodes connected in reverse series, the first diode unit being any one of the diode units of the first limiting circuit;

the second diode unit includes at least two diodes connected in reverse series, and the second diode unit is any one diode unit of the second limiter circuit.

4. The linear limiter of claim 3, wherein the first diode unit includes a first diode and a second diode, and the second diode unit includes a third diode and a fourth diode;

the anode of the first diode is the anode of the first diode unit, the cathode of the first diode is connected with the anode of the second diode, and the cathode of the second diode is the cathode of the first diode unit;

the anode of the third diode is the anode of the second diode unit, the cathode of the third diode is connected with the anode of the fourth diode, and the cathode of the fourth diode is the cathode of the second diode unit.

5. The linear limiter of claim 3, wherein each diode of the first limiting module is a GaN PIN diode.

6. The linear limiter of claim 1, wherein the diode unit of the third limiting circuit and the diode unit of the fourth limiting circuit each include one diode.

7. The linear limiter of claim 6, wherein each diode of the second limiting module is a GaN PIN diode.

8. The linear limiter of claim 1, wherein an electrical length between the first limiting module and the second limiting module is greater than a preset electrical length threshold.

9. The linear limiter according to any one of claims 1 to 8, further comprising a third isolation block, a first end of the third isolation block being connected to the first end of the first limiting block, and a second end of the third isolation block being connected to the first end of the second limiting block.

10. The linear limiter of claim 9, wherein the first isolation block includes a first capacitor, the second isolation block includes a second capacitor, and the third isolation block includes a third capacitor.

Technical Field

The invention belongs to the technical field of electronic devices, and particularly relates to a linear amplitude limiter.

Background

High Power Microwave (HPM) refers to a source of coherent electromagnetic radiation with an instantaneous peak power of over 100MW, and a radiation wavelength in the centimeter to millimeter range, i.e., a frequency between 0.3GHz and 300 GHz. Under the rapid development of high-power microwave weapons and the gradual maturity of electronic countermeasure technology, the electromagnetic environment faced by present electronic equipment is more complex and threatened more greatly. Due to the characteristics of high power, high frequency and the like, high-power microwaves have great interference and harm to electronic equipment, and the protection requirement for high-power microwave weapons is more and more urgent.

With the development of electronic technology and the progress of semiconductor technology, the linearity of the receiving link becomes higher and higher. The application demand of the high power-tolerant high linear amplitude limiter is huge. The traditional HPM amplitude limiter generally adopts a GaAs (gallium arsenide) amplitude limiter, and the GaAs amplitude limiter has low power resistance and low linearity (P-1 is in the magnitude of 10 dBm), and cannot meet the requirement of high-power high-linearity amplitude limiting.

Disclosure of Invention

In view of this, embodiments of the present invention provide a linear amplitude limiter to solve the problem of low power tolerance of the amplitude limiter in the prior art.

An embodiment of the present invention provides a linear limiter, including:

the device comprises a first isolation module, a first amplitude limiting module, a second amplitude limiting module and a second isolation module;

the first amplitude limiting module comprises a first amplitude limiting circuit and a second amplitude limiting circuit, and the second amplitude limiting module comprises a third amplitude limiting circuit and a fourth amplitude limiting circuit; the first amplitude limiting circuit, the second amplitude limiting circuit, the third amplitude limiting circuit and the fourth amplitude limiting circuit respectively comprise at least two diode units;

the first end of the first isolation module is an amplitude limiting input end, the second end of the first isolation module is respectively connected with the first end of the first amplitude limiting module, the first end of the second amplitude limiting module and the first end of the second isolation module, and the second end of the second isolation module is an amplitude limiting output end;

the anodes of the diode units of the first amplitude limiting circuit and the cathodes of the diode units of the second amplitude limiting circuit are respectively connected with the first end of the first amplitude limiting module, and the anodes of the diode units of the third amplitude limiting circuit and the cathodes of the diode units of the fourth amplitude limiting circuit are respectively connected with the first end of the second amplitude limiting module; the cathode of each diode unit of the first amplitude limiting circuit, the anode of each diode unit of the second amplitude limiting circuit, the cathode of each diode unit of the third amplitude limiting circuit and the anode of each diode unit of the fourth amplitude limiting circuit are respectively grounded.

In one embodiment, the linear limiter further comprises an input matching circuit and an output matching circuit;

the first end of the input matching circuit is connected with the second end of the first isolation module, and the second end of the input matching circuit is connected with the first end of the first amplitude limiting module;

and the first end of the output matching circuit is connected with the first end of the second amplitude limiting module, and the second end of the output matching circuit is connected with the first end of the second isolation module.

In one embodiment, the first diode unit comprises at least two diodes connected in series in opposite directions, the first diode unit being any diode unit of the first clipping circuit;

the second diode unit includes at least two diodes connected in reverse series, and the second diode unit is any one diode unit of the second limiter circuit.

In one embodiment, the first diode unit includes a first diode and a second diode, and the second diode unit includes a third diode and a fourth diode;

the anode of the first diode is the anode of the first diode unit, the cathode of the first diode is connected with the anode of the second diode, and the cathode of the second diode is the cathode of the first diode unit;

the anode of the third diode is the anode of the second diode unit, the cathode of the third diode is connected with the anode of the fourth diode, and the cathode of the fourth diode is the cathode of the second diode unit.

In one embodiment, each diode of the first clipping module is a GaN PIN diode.

In one embodiment, the diode unit of the third clipping circuit and the diode unit of the fourth clipping circuit each comprise one diode.

In one embodiment, each diode of the second clipping module is a GaN PIN diode.

In one embodiment, an electrical length between the first and second clipping modules is greater than a preset electrical length threshold.

In one embodiment, the linear amplitude limiter further includes a third isolation module, a first end of the third isolation module is connected to the first end of the first amplitude limiting module, and a second end of the third isolation module is connected to the first end of the second amplitude limiting module.

In one embodiment, the first isolation module comprises a first capacitance, the second isolation module comprises a second capacitance, and the third isolation module comprises a third capacitance.

The present invention provides a linear limiter comprising: the device comprises a first isolation module, a first amplitude limiting module, a second amplitude limiting module and a second isolation module; the first amplitude limiting module comprises a first amplitude limiting circuit and a second amplitude limiting circuit, and the second amplitude limiting module comprises a third amplitude limiting circuit and a fourth amplitude limiting circuit; the first amplitude limiting circuit, the second amplitude limiting circuit, the third amplitude limiting circuit and the fourth amplitude limiting circuit respectively comprise at least two diode units. In the embodiment, the diode junction capacitance can be reduced and the number of diodes is increased through the parallel connection of the plurality of diode units in the first amplitude limiting module and the second amplitude limiting module, so that the power resistance of the amplitude limiter is improved, and the reliability of the linear amplitude limiter is further improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a linear limiter according to an embodiment of the present invention;

fig. 2 is a circuit diagram of a linear limiter according to an embodiment of the present invention;

fig. 3 is a diagram of a coaxial GaN PIN slicer according to an embodiment of the present invention;

fig. 4 is a diagram of a box-shaped GaN PIN slicer provided in the embodiment of the present invention;

FIG. 5 is a schematic diagram of a surface mount GaN PIN slicer provided in an embodiment of the present invention;

fig. 6 is an S-parameter simulation curve of a linear limiter according to an embodiment of the present invention.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.