A design method for equalizer system

Abstract

The present application provides a design method for an equalizer system, comprising: providing a plurality of equalizing units, the plurality of equalizing units forming an equalizer system; and adjusting the frequency and equalization amount of a radio frequency signal input to the equalizer system by adjusting at least one of the equalizing units. This method adjusts the equalization frequency response characteristics of the equalizing unit or performs fixed-point compensation on the input radio frequency signal, thereby meeting various gain compensation requirements.

Description

Technical Field

[0001] The present invention relates to the field of radio frequency technology, and in particular to a design method for an equalizer system. Background Art

[0002] Broadband applications for RF circuits are increasingly demanding. However, the inherent broadband frequency response of RF devices leads to uneven gain in wireless systems. Gain equalizers are often used to address this issue. Gain equalizers can effectively optimize the gain flatness of the transmit and receive links. Conventional gain equalizers are quasi-linear equalizers.

[0003] However, in actual engineering applications, there are often multiple levels of different components in a transceiver link, and the frequency response characteristics of these components are often different. The change trend of the total gain after the series superposition and accumulation of multiple levels of components is often not linear, or the overall gain is linear, but there are obvious gain fluctuations at some frequency points. As a result, traditional power equalizers cannot effectively compensate for broadband gain flatness. Summary of the Invention

[0004] In view of the above problems in the prior art, the present invention proposes a design method for an equalizer system, which mainly meets different gain equalization compensation requirements by adjusting the equalization unit.

[0005] In order to achieve the above-mentioned and other purposes, the technical solutions adopted by the present invention are as follows.

[0006] The present application provides a design method for an equalizer system, comprising: providing a plurality of equalizing units, wherein the plurality of equalizing units constitute an equalizer system; and adjusting the frequency and equalization amount of a radio frequency signal input to the equalizer system by adjusting at least one of the equalizer units.

[0007] In one embodiment of the present application, a plurality of the equalizing units are connected in series to linearly superimpose the equalization amount and adjust the gain equalization curve so that the equalization slope of the gain equalization curve increases exponentially.

[0008] In an embodiment of the present application, a plurality of the equalization units are connected in parallel to average the equalization amount and adjust the equalization slope of the gain equalization curve.

[0009] In one embodiment of the present application, a plurality of the equalizing units are connected in series and parallel to be tuned to different compensation frequencies and compensation amounts, so as to compensate the radio frequency signal by the compensation frequencies and compensation amounts, thereby obtaining an arbitrary gain equalization curve of multiple waves.

[0010] In one embodiment of the present application, the balancing unit includes a main tuning unit, one end of which serves as an RF input end to receive a first RF signal, and the other end of the main tuning unit serves as an RF output end to output a second RF signal; a first auxiliary tuning unit, one end of which is connected to the RF input end and the other end is grounded; a second auxiliary tuning unit, one end of which is connected to the RF output end and the other end is grounded; wherein the main tuning unit, the first auxiliary tuning unit and the second auxiliary tuning unit are all adjustable structures; by matching the main tuning unit, the first auxiliary tuning unit and the second auxiliary tuning unit, the balancing frequency response characteristics of the balancing unit can be adjusted or the first RF signal can be compensated.

[0011] In one embodiment of the present application, the resonant frequency of the main tuning unit is adjusted to the low-end frequency of the operating frequency band to achieve a gain equalization curve with a negative slope, and the basic equalization amount is adjusted by the main tuning unit; the main tuning unit and the first auxiliary tuning unit and the second auxiliary tuning unit are impedance matched and the linearity of the gain equalization curve is adjusted so that the main tuning unit and the first auxiliary tuning unit and the second auxiliary tuning unit are at the same frequency, and a gain equalization curve with a negative slope at the same frequency is obtained, wherein the main tuning unit and the first auxiliary tuning unit and the second auxiliary tuning unit are all composed of an LC resonant part and an impedance part.

[0012] In one embodiment of the present application, the resonant frequency of the main tuning unit is adjusted to the low-end frequency of the operating frequency band to achieve a gain equalization curve with a negative slope, and the basic equalization amount is adjusted by the main tuning unit; the main tuning unit and the first auxiliary tuning unit and the second auxiliary tuning unit are impedance matched and the linearity of the gain equalization curve is adjusted, so that the main tuning unit and the first auxiliary tuning unit and the second auxiliary tuning unit are out of frequency, and an out-of-frequency negative slope gain equalization curve is obtained, wherein the main tuning unit and the first auxiliary tuning unit and the second auxiliary tuning unit are all composed of an LC resonant part and an impedance part.

[0013] In one embodiment of the present application, the resonant frequency of the main tuning unit is adjusted to the high-end frequency of the operating frequency band to achieve a gain equalization curve with a positive slope, and the basic equalization amount is adjusted by the main tuning unit; the main tuning unit and the first auxiliary tuning unit and the second auxiliary tuning unit are impedance matched and the linearity of the gain equalization curve is adjusted so that the main tuning unit and the first auxiliary tuning unit and the second auxiliary tuning unit are at the same frequency, and a gain equalization curve with a positive slope at the same frequency is obtained, wherein the main tuning unit and the first auxiliary tuning unit and the second auxiliary tuning unit are all composed of an LC resonant part and an impedance part.

[0014] In one embodiment of the present application, the resonant frequency of the main tuning unit is adjusted to the high-end frequency of the operating frequency band to achieve a gain equalization curve with a positive slope, and the basic equalization amount is adjusted by the main tuning unit; the main tuning unit and the first auxiliary tuning unit and the second auxiliary tuning unit are impedance matched and the linearity of the gain equalization curve is adjusted so that the main tuning unit and the first auxiliary tuning unit and the second auxiliary tuning unit are out of frequency, and an out-of-frequency positive slope gain equalization curve is obtained, wherein the main tuning unit and the first auxiliary tuning unit and the second auxiliary tuning unit are all composed of an LC resonant part and an impedance part.

[0015] In an embodiment of the present application, the basic equalization amount is adjusted by adjusting the resistance value of the impedance part of the main tuning unit.

[0016] In an embodiment of the present application, the equalization range of the gain equalization curve is adjusted by adjusting the inductance and capacitance of the LC resonance part of the main tuning unit.

[0017] In an embodiment of the present application, the linearity compensation amount of the gain equalization curve is adjusted by adjusting the resistance value of the first auxiliary tuning unit and / or the second auxiliary tuning unit.

[0018] In one embodiment of the present application, the linearity compensation frequency and compensation range of the gain equalization curve are adjusted by adjusting the inductance and capacitance of the LC resonance part of the first auxiliary tuning unit and / or the second auxiliary tuning unit.

[0019] As described above, the design method of an equalizer system provided by the present invention has the following beneficial effects.

[0020] By connecting multiple equalizing units to form an equalizer system, the equalizing slope adjustment of different gain equalizing curves, as well as the frequency compensation and compensation amount of the gain equalizing curve can be achieved by adjusting the equalizing units to meet the gain equalization compensation requirements of different RF application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Shown is a circuit diagram of three balancing units connected in series according to the present invention.

[0022] Figure 2 Shown is a circuit diagram of three balancing units connected in parallel according to the present invention.

[0023] Figure 3 and Figure 4 It shows a circuit diagram of four balancing units connected in series and parallel in the present invention.

[0024] Figure 5 Shown is a circuit diagram of the equalizing unit of the present invention.

[0025] Figures 6-10 Shown are simulation experiment curves of the equalizing unit in various embodiments of the present invention. DETAILED DESCRIPTION

[0026] The following describes the embodiments of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other unless they conflict.

[0027] It should be noted that the illustrations provided in the following embodiments are merely schematic illustrations of the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be changed arbitrarily, and the component layout may also be more complex.

[0028] See also Figures 1 to 10 . It should be noted that the diagrams provided in this embodiment only illustrate the basic concept of the present invention in a schematic manner, so the diagrams only show the components related to the present invention rather than being drawn according to the number, shape and size of the components during actual implementation. During actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated. The structure, proportion, size, etc. shown in the diagrams attached to this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which the present invention can be implemented. Therefore, they have no technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose that can be achieved by the present invention.

[0029] In one embodiment, the present application provides a method for designing an equalizer system, the method comprising the following steps:

[0030] Step S01: providing a plurality of equalizing units, wherein the plurality of equalizing units constitute an equalizer system.

[0031] Step S02: Adjust the frequency and equalization amount of the radio frequency signal input to the equalizer system by adjusting at least one equalization unit. Different connection modes between the equalization units correspond to different adjustment effects.

[0032] See also Figure 1 , Figure 1This is a schematic diagram of the system architecture of multiple balancing units connected in series in one embodiment of the present application. In one embodiment, multiple balancing units can be connected in series, and the balancing values ​​of the multiple balancing units can be linearly superimposed. Adjusting the gain balancing curve can increase the balancing slope of the gain balancing curve exponentially, with the specific increase being positively correlated with the number of balancing units. The number of balancing units can be set and adjusted based on actual application requirements and is not limited here.

[0033] See also Figure 2 , Figure 2 This is a schematic diagram of the system architecture for multiple balancing units connected in parallel in one embodiment of the present application. In one embodiment, multiple balancing units can be connected in parallel. Based on this parallel structure, the balancing amounts of the multiple balancing units are averaged, and the balancing slope of the gain balancing curve is adjusted. By adjusting one or more balancing units in the parallel structure, different balancing slopes can be achieved.

[0034] In one embodiment, a plurality of the balancing units are connected in series and parallel to tune different compensation frequencies and compensation amounts, so as to compensate the radio frequency signal by the compensation frequencies and compensation amounts, thereby obtaining a multi-wave arbitrary gain equalization curve, wherein the compensation frequencies and the compensation amounts are determined by the resonant frequencies of the plurality of the balancing units.

[0035] See also Figure 3 and Figure 4 For example, a four-equalizing unit system can be configured by connecting two equalizing units in parallel and then in series, or by connecting three equalizing units in parallel and then in series with another equalizing unit. This series-parallel combination allows the equalizer system to be tuned into a gain-equalizing network capable of achieving different compensation frequencies and amounts. By adjusting one or more of the equalizing units, arbitrary gain-equalizing curves with multiple waves can be achieved.

[0036] like Figure 5 As shown, the present invention provides a balancing unit, which includes:

[0037] The main tuning unit 1 has one end serving as the RF input end of the equalizing unit to receive the first RF signal V1, and the other end serving as the RF output end of the equalizing unit to output the second RF signal V2;

[0038] A first auxiliary tuning unit 2, one end of which is connected to the RF input end of the equalizing unit and the other end is grounded;

[0039] A second auxiliary tuning unit 3, one end of which is connected to the RF output end of the equalizing unit and the other end is grounded;

[0040] Among them, the main tuning unit 1, the first auxiliary tuning unit 2 and the second auxiliary tuning unit 3 respectively include adjustable structures, and the main tuning unit 1, the first auxiliary tuning unit 2 and the second auxiliary tuning unit 3 are matched and adjusted to adjust the equalization frequency response characteristics of the equalization unit or compensate for the first RF signal V1.

[0041] In one embodiment, the main tuning unit 1, the first auxiliary tuning unit 2, and the second auxiliary tuning unit 3 can all be composed of an LC resonant portion and an impedance portion. The LC resonant portion of the main tuning unit 1 is connected in parallel with the impedance portion, while the resonant portion of the first and second auxiliary tuning units 2 and 3 are connected in series with the impedance portion.

[0042] In detail, such as Figure 5 As shown, the main tuning unit 1 includes a first resistor R1 and a first resonance module. One end of the first resistor R1 receives a first RF signal V1, and the other end of the first resistor R1 outputs a second RF signal V2. The first resonance module is arranged in parallel with the first resistor R1.

[0043] In more detail, Figure 5 As shown, the first resonant module includes a first inductor L1 and a first capacitor C1 , and the first inductor L1 and the first capacitor C1 are respectively connected in parallel with the first resistor R1 .

[0044] In detail, such as Figure 5 As shown, the first auxiliary tuning unit 2 includes a second resistor R2 and a second resonance module. One end of the second resistor R2 receives the first RF signal V1 , and the other end of the second resistor R2 is connected in series with the second resonance module and then grounded.

[0045] In more detail, Figure 5 As shown, the second resonant module includes a second inductor L2 and a second capacitor C2. The other end of the second resistor R2 is connected in series with the second inductor L2 and then grounded. The second capacitor C2 is connected in parallel with the second inductor L3.

[0046] In detail, such as Figure 5 As shown, the second auxiliary tuning unit 3 includes a third resistor R3 and a third resonance module. One end of the third resistor R3 receives the second RF signal V2, and the other end of the third resistor R3 is grounded after being connected in series with the third resonance module.

[0047] In more detail, Figure 5 As shown, the third resonant module includes a third inductor L3 and a third capacitor C3. The other end of the third resistor R3 is connected in series to ground via the third inductor L3. The third capacitor C3 is connected in parallel to the third inductor L3.

[0048] The first resistor R1 , the second resistor R2 , and the third resistor R3 each include an adjustable resistor, the first inductor L1 , the second inductor L2 , and the third inductor L3 each include an adjustable inductor, and the first capacitor C1 , the second capacitor C2 , and the third capacitor C3 each include an adjustable capacitor.

[0049] In detail, such as Figure 5 As shown, the entire balancing unit is designed based on a π-type attenuator, and an LC resonance module is added to each resistor of the π-type attenuator. The balancing unit can be implemented in the form of lumped LC components (4GHz), and high-frequency balancing can be achieved through distributed microstrip lines and micro-assembly IPD methods; the balancing frequency response characteristics of the balancing unit include at least quasi-linear positive slope balancing frequency response characteristics, quasi-linear negative slope balancing frequency response characteristics, single wave curve balancing frequency response characteristics and double wave curve balancing frequency response characteristics. The balancing unit can also perform fixed-point negative compensation on the first RF signal V1.

[0050] In more detail, Figure 5 The working principle of the equalization unit shown is as follows:

[0051] 1) The main tuning unit 1 determines the main trend of the gain compensation balanced frequency response characteristic curve. By changing the resonant frequency of the first resonant module in the main tuning unit 1 (adjusting the inductance of the first inductor L1 and the capacitance of the first capacitor C1), a switch between a quasi-linear positive slope balanced frequency response characteristic curve (decreasing the resonant frequency of the first resonant module) and a quasi-linear negative slope balanced frequency response characteristic curve (increasing the resonant frequency of the first resonant module) can be achieved. The resistance value of the first resistor R1 in the main tuning unit 1 determines the curve amplitude (attenuation). The balanced frequency response characteristic curve can be adjusted by combining the parameter adjustment of the first resonant module and the parameter adjustment of the first resistor R1. When the resonant frequency of the first resonant module is fixed, the inductance value of the first inductor L1 and the capacitance value of the first capacitor C1 can be appropriately adjusted to adjust the resonance quality factor Q of the first resonant module, thereby adjusting the flatness of the balanced frequency response characteristic curve (the larger the inductance value of the first inductor L1, the smoother the curve; the smaller the inductance value of the first inductor L1, the sharper the curve) and the operating bandwidth of the gain equalization.

[0052] 2) The first auxiliary tuning unit 2 and the second auxiliary tuning unit 3 can adjust the local trend of the balanced frequency response characteristic curve of the gain compensation, change the resonant frequency of the second resonant module in the first auxiliary tuning unit 2 (adjust the inductance value of the second inductor L2 and the capacitance value of the second capacitor C2) and change the resonant frequency of the third resonant module in the second auxiliary tuning unit 3 (adjust the inductance value of the third inductor L3 and the capacitance value of the third capacitor C3), so that the resonant frequency of the second resonant module in the first auxiliary tuning unit 2 and the resonant frequency of the third resonant module in the second auxiliary tuning unit 3 are equal. The same or different parameters can cause the balanced frequency response characteristic curve to have one inflection point or two inflection points, thereby realizing a single-wave balanced frequency response characteristic curve or a dual-wave balanced frequency response characteristic curve. The resistance value of the second resistor R2 in the first auxiliary tuning unit 2 and the resistance value of the third resistor R3 in the second auxiliary tuning unit 3 determine the local amplitude (attenuation) of the curve. By combining the parameter adjustment of the second resonance module and the parameter adjustment of the second resistor R2, as well as the parameter adjustment of the third resonance module and the parameter adjustment of the third resistor R3, the local balanced frequency response characteristic curve is further fine-tuned.

[0053] 3) In the main tuning unit 1, when the resonant frequency of the first resonant module is fixed, the inductance value of the first inductor L1 in the first resonant module is appropriately reduced to make the balanced frequency response characteristic curve sharper. Then, the resistance value of the first resistor R1 is changed to achieve fixed-point negative compensation at certain frequency points.

[0054] In an optional embodiment of the present invention, a simulation experiment is conducted on the balancing unit of the present invention. The parameter values ​​of the components in the balancing unit are shown in the following table. The obtained simulation experiment curve is shown in FIG. Figure 6 shown.

[0055] R1(ohm) L1(nH) C1(pF) R2(ohm) L2(nH) C2(pF) R3(ohm) L3(nH) C3(pF) 40 1000 3.9 150 3 0.5 150 3 0.5

[0056] Among them, such as Figure 6 As shown in the figure, the solid line is the gain equalization frequency response characteristic curve, and the dotted line is the echo curve; in the gain equalization frequency response characteristic curve, the frequency of frequency point M1 is 102.2MHz, the gain of frequency point M1 is -6.207dB, the frequency of frequency point M2 is 2.015GHz, the gain of frequency point M2 is -3.225dB, the frequency of frequency point M3 is 4.000GHz, the gain of frequency point M3 is -0.258dB, and the operating bandwidth is 100MHz~4.0GHz, achieving quasi-linear positive slope gain equalization, and the linearity is better than that of conventional equalizers; within the working bandwidth, the gain of the echo curve is less than -10dB, and the corresponding standing wave ratio is less than 2, which meets the design and use requirements.

[0057] In an optional embodiment of the present invention, a simulation experiment is conducted on the balancing unit of the present invention. The parameter values ​​of the components in the balancing unit are shown in the following table. The obtained simulation experiment curve is shown in FIG. Figure 7 shown.

[0058] R1(ohm) L1(nH) C1(pF) R2(ohm) L2(nH) C2(pF) R3(ohm) L3(nH) C3(pF) 35 68 10 150 8.2 0.9 150 8.2 0.9

[0059] Among them, such as Figure 7 As shown in the figure, the solid line is the gain equalization frequency response characteristic curve, and the dotted line is the echo curve; in the gain equalization frequency response characteristic curve, the frequency of frequency point M1 is 210.5MHz, the gain of frequency point M1 is -5.797dB, the frequency of frequency point M2 is 1.077GHz, the gain of frequency point M2 is -2.573dB, the frequency of frequency point M3 is 1.798GHz, the gain of frequency point M3 is -0.222dB, and quasi-linear positive slope gain equalization is achieved within 200MHz~1.8GHz (taken as the working bandwidth), and quasi-linear negative slope gain equalization is achieved within 1.8GHz~3.0GHz, and the linearity is better than that of conventional equalizers; within the working bandwidth, the gain of the echo curve is less than -10dB, and the corresponding standing wave ratio is less than 2, which meets the design and use requirements.

[0060] In an optional embodiment of the present invention, a simulation experiment is conducted on the balancing unit of the present invention. The parameter values ​​of each component in the balancing unit are shown in the following table. The obtained simulation experiment curve is shown in FIG. Figure 8 shown.

[0061] R1(ohm) L1(nH) C1(pF) R2(ohm) L2(nH) C2(pF) R3(ohm) L3(nH) C3(pF) 53.55 1000 8.495 190.75 5.6 2 150 3.3 0.5

[0062] Among them, such as Figure 8 As shown in the figure, the solid line is the gain equalization frequency response characteristic curve, and the dotted line is the echo curve; in the gain equalization frequency response characteristic curve, the frequency of frequency point M1 is 102.2MHz, and the gain of frequency point M1 is -6.722dB, the frequency of frequency point M2 is 1.510GHz, and the gain of frequency point M2 is -1.589dB, the frequency of frequency point M3 is 2.520GHz, and the gain of frequency point M3 is -2.036dB, the frequency of frequency point M4 is 3.856GHz, and the gain of frequency point M4 is -1.113dB, and the operating bandwidth is 100MHz~4.0GHz, realizing single inflection point curve (single wave curve) gain equalization; within the working bandwidth, the gain of the echo curve is less than -10dB, and the corresponding standing wave ratio is less than 2, which meets the design and use requirements.

[0063] In an optional embodiment of the present invention, a simulation experiment is conducted on the balancing unit of the present invention. The parameter values ​​of the components in the balancing unit are shown in the following table. The obtained simulation experiment curve is shown in FIG. Figure 9 shown.

[0064] R1(ohm) L1(nH) C1(pF) R2(ohm) L2(nH) C2(pF) R3(ohm) L3(nH) C3(pF) 55 500 4.4 200 2.2 1.8 210.25 3.9 2.2

[0065] Among them, such as Figure 9As shown in the figure, the solid line is the gain equalization frequency response characteristic curve, and the dotted line is the echo curve; in the gain equalization frequency response characteristic curve, the frequency of frequency point M1 is 102.2MHz, and the gain of frequency point M1 is -6.454dB, the frequency of frequency point M2 is 1.510GHz, and the gain of frequency point M2 is -2.537dB, the frequency of frequency point M3 is 2.520GHz, and the gain of frequency point M3 is -1.356dB, the frequency of frequency point M4 is 3.856GHz, and the gain of frequency point M4 is -2.101dB, and the operating bandwidth is 100MHz~4.0GHz, realizing double inflection point curve (double wave curve) gain equalization; within the working bandwidth, the gain of the echo curve is less than -10dB, and the corresponding standing wave ratio is less than 2, which meets the design and use requirements.

[0066] In an optional embodiment of the present invention, a simulation experiment is conducted on the balancing unit of the present invention. The parameter values ​​of the components in the balancing unit are shown in the following table. The obtained simulation experiment curve is shown in FIG. Figure 10 shown.

[0067] R1(ohm) L1(nH) C1(pF) R2(ohm) L2(nH) C2(pF) R3(ohm) L3(nH) C3(pF) 55 1.2 40 83.5 1.5 2.2 210.25 1.5 2.2

[0068] Among them, such as Figure 10 As shown in the figure, the solid line is the gain equalization frequency response characteristic curve, and the dotted line is the echo curve; in the gain equalization frequency response characteristic curve, the frequency of frequency point M1 is 102.2MHz, and the gain of frequency point M1 is -3.037dB, the frequency of frequency point M2 is 715.7MHz, and the gain of frequency point M2 is -7.728dB, the frequency of frequency point M3 is 2.773GHz, and the gain of frequency point M3 is -0.005dB, the frequency of frequency point M4 is 3.856GHz, and the gain of frequency point M4 is -2.716dB, the operating bandwidth is 100MHz~4.0GHz, and fixed-point negative compensation is achieved at frequency point M2; within the operating bandwidth, the gain of the echo curve is less than -10dB, and the corresponding standing wave ratio is less than 2, which meets the design and use requirements.

[0069] In one embodiment, the above-mentioned equalizing unit is provided, and a first RF signal V1 is input into the equalizing unit. In the equalizing unit, the equalizing frequency response characteristics of the equalizing unit are adjusted by matching and adjusting the main tuning unit 1, the first auxiliary tuning unit 2, and the second auxiliary tuning unit 3, and gain equalization tuning is performed on the first RF signal V1 to obtain a second RF signal V2. When adjusting the equalizing frequency response characteristics of the equalizing unit, the equalizing frequency response characteristics of the equalizing unit can be adjusted to one of a quasi-linear positive slope equalizing frequency response characteristic, a quasi-linear negative slope equalizing frequency response characteristic, a single-wave curve equalizing frequency response characteristic, and a double-wave curve equalizing frequency response characteristic. In the equalizing unit, fixed-point negative compensation is performed on the first RF signal V1 by matching and adjusting the main tuning unit 1, the first auxiliary tuning unit 2, and the second auxiliary tuning unit 3.

[0070] In one embodiment, the frequency response range of the universal gain equalizer is adjusted by changing the resonant frequency of the first resonant unit, and the basic equalization amount of the universal gain equalizer is changed by changing the impedance of the first equalization depth adjustment unit; the linearity of the gain equalization curve of the universal gain equalizer is adjusted by changing the resonant frequency of the second resonant unit, and the linearity of the gain equalization curve is further adjusted by changing the impedance of the second equalization depth adjustment unit; the linearity of the gain equalization curve of the universal gain equalizer is adjusted by changing the resonant frequency of the third resonant unit, and the linearity of the gain equalization curve is further adjusted by changing the impedance of the third equalization depth adjustment unit.

[0071] In one embodiment, based on the structural design of the equalizing unit, the equalizing frequency response characteristics of the equalizing unit can be adjusted or fixed-point compensation can be performed on the first RF signal by matching and adjusting the main tuning unit, the first auxiliary tuning unit, and the second auxiliary tuning unit, thereby enabling multiple modes of adjustable gain compensation to be performed on the input RF signal. The resonant frequency of the main tuning unit can be adjusted to the low-end frequency of the operating frequency band to achieve a negative-slope gain equalization curve, and the basic equalization amount can be adjusted by the main tuning unit; the main tuning unit is impedance matched with the first auxiliary tuning unit and the second auxiliary tuning unit, and the linearity of the gain equalization curve is adjusted so that the main tuning unit, the first auxiliary tuning unit, and the second auxiliary tuning unit are at the same frequency, thereby obtaining a negative-slope gain equalization curve at the same frequency, wherein the main tuning unit, the first auxiliary tuning unit, and the second auxiliary tuning unit are all composed of an LC resonant part and an impedance part. Specifically, the basic equalization amount can be adjusted by adjusting the resistance value of the impedance part (first resistor) of the main tuning unit, and the equalization range of the gain equalization curve can be further adjusted by adjusting the inductance value and capacitance value of the resonant part (first inductor and first capacitor) of the main tuning unit. The equalization amount adjustment requirements of different equalization ranges can be met. The linearity compensation amount of the gain equalization curve can be adjusted by adjusting the resistance of the first auxiliary tuning unit and / or the second auxiliary tuning unit, and the gain equalization curve can be compensated based on the linearity compensation amount. The resonant frequency of the main tuning unit, the first auxiliary tuning unit and the second auxiliary tuning unit can be adjusted to the same frequency, and then the same frequency negative slope gain equalization curve can be achieved in conjunction with the equalization amount adjustment.

[0072] In one embodiment, based on the structural design of the equalization unit, the resonant frequency of the main tuning unit is adjusted to the low end of the operating frequency band to achieve a negative-slope gain equalization curve. The basic equalization amount is adjusted using the main tuning unit. Impedance matching and gain equalization curve linearity are adjusted between the main tuning unit, the first auxiliary tuning unit, and the second auxiliary tuning unit, so that the main tuning unit, the first auxiliary tuning unit, and the second auxiliary tuning unit are out of phase with each other, resulting in an out-of-phase negative-slope gain equalization curve. Each of the main tuning unit, the first auxiliary tuning unit, and the second auxiliary tuning unit comprises an LC resonant portion and an impedance portion. The resonant frequencies of the main tuning unit, the first auxiliary tuning unit, and the second auxiliary tuning unit can be adjusted to be out of phase with each other. For example, the resonant frequency of the main tuning unit is at the low end of the operating frequency band, while the resonant frequencies of the first and second auxiliary tuning units are higher than this low end. The out-of-phase negative-slope gain equalization curve is then achieved by adjusting the equalization amount. Alternatively, only one of the first and second auxiliary tuning units may be out of phase with the main tuning unit.

[0073] In one embodiment, the resonant frequency of the main tuning unit is adjusted to the high end of the operating frequency band to achieve a positive-slope gain equalization curve, and the basic equalization amount is adjusted by the main tuning unit. The main tuning unit is impedance matched with the first and second auxiliary tuning units, and the linearity of the gain equalization curve is adjusted so that the main tuning unit, the first and second auxiliary tuning units are out of frequency, resulting in an out-of-frequency positive-slope gain equalization curve. The main tuning unit, the first and second auxiliary tuning units are each composed of an LC resonant portion and an impedance portion. The linearity compensation amount of the gain equalization curve can be adjusted by adjusting the resistance of the first and / or second auxiliary tuning units, and the gain equalization curve is compensated based on the linearity compensation amount. The resonant frequencies of the main tuning unit, the first and second auxiliary tuning units can be adjusted to the same frequency, and then the equalization amount is adjusted to achieve a same-frequency positive-slope gain equalization curve.

[0074] In one embodiment, the resonant frequency of the main tuning unit is adjusted to the high end of the operating frequency band to achieve a positive-slope gain equalization curve, and the basic equalization amount is adjusted using the main tuning unit. Impedance matching and linearity adjustment of the gain equalization curve are performed between the main tuning unit, the first auxiliary tuning unit, and the second auxiliary tuning unit, so that the main tuning unit, the first auxiliary tuning unit, and the second auxiliary tuning unit are out of sync, resulting in an out-of-frequency positive-slope gain equalization curve. The main tuning unit, the first auxiliary tuning unit, and the second auxiliary tuning unit all consist of an LC resonant portion and an impedance portion. The resonant frequencies of the main tuning unit, the first auxiliary tuning unit, and the second auxiliary tuning unit can be adjusted to out of sync, and then the equalization amount can be adjusted to achieve an out-of-frequency positive-slope gain equalization curve.

[0075] In one embodiment, the resonant frequency of the first resonant unit is adjusted to the middle frequency of the operating frequency band, and the basic equalization amount is adjusted by the first equalization depth adjustment unit, and then the impedance matching and the linearity adjustment of the equalization curve are achieved by the first sub-tuning unit and the second sub-tuning unit to form a broken line gain equalization curve.

[0076] In one embodiment, the resonant frequency of the first resonant unit is adjusted to a first target frequency, and the resonant frequencies of the second resonant unit and the third resonant unit are respectively adjusted to second target frequencies. Based on the tuning of the resonant frequencies, a double-wave gain equalization curve is formed, and the double-wave gain equalization curve has two additional positive gain compensation points.

[0077] In one embodiment, the steepness of the curves near the two additional positive gain compensation points is adjusted by adjusting the ratio of the inductance to the capacitance in the first resonant unit, the second resonant unit, and the third resonant unit.

[0078] In one embodiment, the steepness of the curves near the two additional positive gain compensation points is increased by reducing the ratio of inductance to capacitance; and the steepness of the curves near the two additional positive gain compensation points is reduced by increasing the ratio of inductance to capacitance.

[0079] In one embodiment, the resonant frequency of the first resonant unit is adjusted to a third target frequency, and the resonant frequencies of the second resonant unit and the third resonant unit are respectively adjusted to fourth target frequencies. Based on the tuning of the resonant frequencies, a positive and negative compensation gain balance curve is formed. The positive and negative compensation gain balance curve has an additional positive gain compensation point and an additional negative gain compensation point, and nonlinear additional gain negative compensation is performed on a specific frequency point through the additional negative gain compensation point.

[0080] In one embodiment, the steepness of the curves near the additional positive gain compensation point and the additional negative gain compensation point is adjusted by adjusting the ratio of the inductance to the capacitance in the first resonance unit, the second resonance unit, and the third resonance unit.

[0081] In one embodiment, the steepness of the curve near the additional negative gain compensation point is increased by reducing the ratio of inductance to capacitance; and the steepness of the curve near the additional negative gain compensation point is reduced by increasing the ratio of inductance to capacitance.

[0082] To summarize, in the design method of the equalizing unit provided in the present invention, based on the equalizing unit structure design of "main tuning unit + first auxiliary tuning unit + second auxiliary tuning unit", the main tuning unit, the first auxiliary tuning unit and the second auxiliary tuning unit can be matched and adjusted to adjust the equalizing frequency response characteristics of the equalizing unit or perform fixed-point compensation on the input RF signal, thereby meeting a variety of different gain compensation requirements.

[0083] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A design method for an equalizer system, characterized in that: include: providing a plurality of equalizing units, wherein the plurality of equalizing units constitute an equalizer system; By adjusting at least one of the equalizing units to adjust the frequency and equalization amount of the radio frequency signal input to the equalizer system, a plurality of the equalizing units are connected in series and parallel to tune to different compensation frequencies and compensation amounts, so as to compensate the radio frequency signal with the compensation frequencies and compensation amounts, thereby obtaining an arbitrary gain equalization curve of multiple waves; The equalizing unit includes a main tuning unit, one end of which serves as a radio frequency input end to receive a first radio frequency signal, and the other end of the main tuning unit serves as a radio frequency output end to output a second radio frequency signal; A first auxiliary tuning unit, one end of which is connected to the RF input terminal and the other end is grounded; a second auxiliary tuning unit, one end of which is connected to the RF output terminal and the other end is grounded; wherein the main tuning unit, the first auxiliary tuning unit and the second auxiliary tuning unit are all adjustable structures; the main tuning unit, the first auxiliary tuning unit and the second auxiliary tuning unit are matched to adjust the equalization frequency response characteristics of the equalization unit or compensate for the first RF signal; the resonant frequency of the main tuning unit is adjusted to the low end frequency of the working frequency band to achieve a gain equalization curve with a negative slope, and the basic equalization amount is adjusted by the main tuning unit; the main tuning unit is impedance matched with the first auxiliary tuning unit and the second auxiliary tuning unit and the linearity of the gain equalization curve is adjusted so that the main tuning unit and the first auxiliary tuning unit are matched. The tuning unit and the second auxiliary tuning unit are synchronized to the same frequency, and a negative slope gain equalization curve of the same frequency is obtained, wherein the main tuning unit, the first auxiliary tuning unit and the second auxiliary tuning unit are all composed of an LC resonant part and an impedance part; the resonant frequency of the main tuning unit is adjusted to the high-end frequency of the working frequency band to achieve a gain equalization curve with a positive slope, and the basic equalization amount is adjusted by the main tuning unit; the main tuning unit, the first auxiliary tuning unit and the second auxiliary tuning unit are impedance matched and the linearity of the gain equalization curve is adjusted, so that the main tuning unit, the first auxiliary tuning unit and the second auxiliary tuning unit are synchronized to the same frequency, and a positive slope gain equalization curve of the same frequency is obtained, wherein the main tuning unit, the first auxiliary tuning unit and the second auxiliary tuning unit are all composed of an LC resonant part and an impedance part.

2. The design method of the equalizer system according to claim 1, characterized in that: The equalization amount is linearly superimposed by connecting a plurality of the equalization units in series and adjusting the gain equalization curve so that the equalization slope of the gain equalization curve increases exponentially.

3. The design method of the equalizer system according to claim 1, characterized in that: A plurality of the equalizing units are connected in parallel to average the equalization amount and adjust the equalization slope of the gain equalization curve.

4. The design method of the equalizer system according to claim 1, characterized in that: include: Adjusting the resonant frequency of the main tuning unit to the low end frequency of the working frequency band to achieve a gain equalization curve with a negative slope, and adjusting the basic equalization amount through the main tuning unit; Impedance matching and linearity adjustment of the gain equalization curve are performed on the main tuning unit, the first auxiliary tuning unit, and the second auxiliary tuning unit, so that the main tuning unit, the first auxiliary tuning unit, and the second auxiliary tuning unit are out of frequency, and an out-of-frequency negative slope gain equalization curve is obtained, wherein the main tuning unit, the first auxiliary tuning unit, and the second auxiliary tuning unit are all composed of an LC resonant part and an impedance part.

5. The design method of the equalizer system according to claim 1, characterized in that: include: Adjusting the resonant frequency of the main tuning unit to the high end frequency of the working frequency band to achieve a gain equalization curve with a positive slope, and adjusting the basic equalization amount through the main tuning unit; The main tuning unit, the first auxiliary tuning unit, and the second auxiliary tuning unit are subjected to impedance matching and linearity adjustment of the gain equalization curve, so that the main tuning unit, the first auxiliary tuning unit, and the second auxiliary tuning unit are out of frequency, and an out-of-frequency positive slope gain equalization curve is obtained, wherein the main tuning unit, the first auxiliary tuning unit, and the second auxiliary tuning unit are all composed of an LC resonant part and an impedance part.

6. The method for designing an equalizer system according to claim 4, wherein: The basic equalization amount is adjusted by adjusting the resistance value of the impedance part of the main tuning unit.

7. The design method of the equalizer system according to claim 6, characterized in that: The equalization range of the gain equalization curve is adjusted by adjusting the inductance and capacitance of the LC resonance part of the main tuning unit.

8. The method for designing an equalizer system according to claim 4, wherein: The linearity compensation amount of the gain equalization curve is adjusted by adjusting the resistance value of the first auxiliary tuning unit and / or the second auxiliary tuning unit.

9. The design method of the equalizer system according to claim 8, characterized in that: The linearity compensation frequency and compensation range of the gain equalization curve are adjusted by adjusting the inductance and capacitance of the LC resonance part of the first auxiliary tuning unit and / or the second auxiliary tuning unit.

Images