TWI652895B - Mixer system and the use method thereof - Google Patents

Abstract

The present invention provides a mixer system having an elemental composition including an expanded dispersion delay line, a mixer device, and a compression dispersion delay line. In another method of using the mixer system of the present invention, the microwave group signal is first input to the signal input end, and the output of the time domain extended pulse is transmitted through the extended dispersion delay line, and then fed to the mixer device. The extended pulse enters the mixer device and is amplified into a pulse waveform having a large amplitude. Finally, the signal having the pulse waveform is sent to the compression dispersion delay line, and the microwave group signal of the signal input end is restored. Modal. Therefore, the mixer system of the present invention can increase the amplification amplitude of the pulse waveform signal and increase the limit of the power of the radio frequency signal when the simple mixer requires the same noise condition.

Description

Mixer system and method of use thereof

The invention relates to a mixer system, in particular to a mixer system which can increase the power limit of a radio frequency signal, and a mixer system which can reduce modulation noise.

In recent years, technological advances in the field of communications have become quite large. For example, the proposed and practical implementation of TDMA, CDMA, FDMA, OFDM, and many other systems has served various communication links, and the basic concepts of these new systems are based on new ones and are used for " "modulation techniques" of the baseband signal. The architecture of radio frequency (RF) circuits, on the other hand, is still slow to date. Partly because of the lack of ultra high-speed devices or the lack of advanced technology, traditional RF signal processing techniques can only be extended within the RF frequency range.

In other words, the signal processing of "RF signal" is largely ignored, and "radio frequency (RF) amplifier" is one of the types of electronic amplifiers. The "RF amplifier" has Converting a low-power radio-frequency signal becomes a function of a higher power signal. In general, the function of the amplifier mainly includes gain, bandwidth, efficiency, stability, linearity, and the like. Among them, the linearity of the "radio frequency amplifier" that can be obtained in a modern communication network is most noticed, and in particular, the linearity has been It is recognized as the most difficult parameter to master.

Usually, in order to achieve high output power and improve power conversion efficiency, RF amplifiers are usually set to work in a range close to a saturated region (or a non-linear region), that is, in " In the case of intermodulation, "third-order harmonics" can cause unnecessary effects. "Intermodulation modulation" is the amplitude modulation (AM) of a signal, also referred to as "amplitude modulation", including two or more different frequencies caused by non-linearity in the system. .

In a radio system, "interactive modulation" produces unwanted "spurious emissions," usually in the form of "sidebands." For radio transmission, this increases the occupied bandwidth, leading to adjacent channel interference, and thus reduces the clarity of audio/data. Or increase the spectrum usage. It is almost impossible to use modern filter technology to filter the “interactive modulation” noise and valid signal generated by the nonlinear factors of the amplifier, because the intermodulation noise and the effective signal are dense. Inseparable. Therefore, the operating power level of the amplifier is limited by the "interactive modulation" noise caused by the nonlinear behavior of the amplifier at the high-power level.

In the architecture diagram of Figure 1 "RF amplifier" of the conventional technology, the main feature of the architecture is the use of the equivalent "expansion dispersion delay" placed in front of the input port of the "RF amplifier 12". Dispersive delay line (DDL) 11", the equal "dispersive line of dispersive delay line (DDL) 11" may be the traditional "RF splitter", " "bandpass filter", "non-dispersive transmission line" and "power combiner". Also, the "expanded dispersion delay line 11" is mainly used to input signals of different frequencies. The different time delays are made, so the "expanded dispersion delay line 11" can be compact and complicated.

In the architecture of the RF amplifier of Figure 1, the cluster of radio-frequency signal includes the frequency band of f ₁ , f ₂ , and f ₃ at the center position. The expanded dispersion delay line 11", the three "band-limited signals" are sequentially generated by the "expanded dispersion delay line 11". In essence, the "wideband" (or cluster) RF signal is segregated to the "sub-band" of some radio frequencies by the use of the "expanded dispersion delay line 11". .

Still as in Figure 1, the three bandwidths are completely divided into three frequency bands in the "time domain sequence". However, in practical applications, the three bandwidth signals can be applied slightly overlapping. Then, the "band-limited sub-band" signal is fed to the RF amplifier. The reason for this arrangement may have two aspects: such a structure will significantly reduce the "interactive modulation" caused by the nonlinearity of the radio frequency, and may lead to the realization of "radio frequency division multiplexing (time-division) of the radio frequency transceiver. Multiple access, TDMA) configuration. The RF signal can isolate three bandwidths, and the "product term" caused by any two bandwidths is minimized. As a result, the "interactive modulation" process of the nonlinear interaction of the "RF amplifier 12" is slowed down.

In addition, since the foregoing conventional technology can separate the RF signals, it also indicates that the RF signals can be controlled. Therefore, the "Sequential Delay" of the "RF frequency band" may also result in the generation of a new "RF". The architecture of the transceiver (RF transceiver) is known to be the result of what was originally expected.

Therefore, there is still a need for a new type of mixer system in the future that can have a good modulation function and can reduce unnecessary modulation effects caused by the nonlinear behavior of the active components.

The present invention provides a mixer system whose component structure includes an extended dispersion delay line, which is connected to the mixer device, and then a compression dispersion delay line.

The invention provides a method for using a mixer system, firstly inputting a microwave group signal at a signal input end, and expanding a microwave group signal into a dispersion pulse in a time domain through an extended dispersion delay line, and then performing an output of the extended pulse. According to the principle of conservation of energy, the amplitude of the scattered pulse is reduced and then fed to the mixer device. After the pulse enters the mixer device, it is compressed into a pulse waveform having a large amplitude. Finally, the signal having the pulse waveform is sent to the compression dispersion delay line, and the mode of the microwave group signal at the signal input end is restored. State, and can greatly increase the amplitude of the pulsed signal.

One of the technical features of the mixer system of the present invention is that a microstrip line is typically used to connect various components.

Another technical feature of the mixer system of the present invention is that the manner in which the various components are connected is interconnected in series.

The elements such as the extended dispersion delay line, the mixer device, and the compression type dispersion delay line shown in the present invention can be mounted on a printed circuit board for the purpose of implementation.

The mixer system of the present invention and its method of use are applicable to many other parts of the radio frequency system.

One of the advantages of the present invention is that it has a good modulation function, so that unnecessary modulation effects caused by nonlinear behavior generated by the active elements can be reduced.

A further advantage of the present invention is that it can greatly reduce the electric power required for the mixer system or the mixer system, and has a highly energy-saving effect.

11‧‧‧Expanded dispersion delay line

12‧‧‧Mixer

20‧‧‧Mixer system

21‧‧‧Expanded dispersion delay line

22‧‧‧Mixer device

23‧‧‧Compressed dispersion delay line

Fig. 1 is an architectural diagram of a conventional conventional mixer.

Fig. 2 is a schematic view showing an embodiment of the "mixer system" of the present invention.

Fig. 3 is a schematic view showing an embodiment of the "expanded dispersion delay line" of the present invention.

Fig. 4 is a view showing an embodiment of the "compression dispersion delay line" of the present invention.

The present invention is a "mixer system", which is a schematic diagram of an embodiment of the "RF mixer system 20" of the present invention shown in FIG. 2, including an "dispersive delay line (DDL) 21". The "mixer device 22" is connected in series, and the "inverse dispersive delay line (IDDL) 23" is connected in series. The aforementioned "mixer system 20" is usually connected by a coaxial signal line, and the manner in which the various elements of the present invention are connected to each other is connected in series. Therefore, the "mixer system 20" of the present invention includes the "expanded dispersion delay line 21", the "mixer device 22", and the "dispersion delay line 21" is placed at the input of the "mixer device 22". The end, and the "compression dispersion delay line 23", and the "compression dispersion delay line 23" are placed at the output end of the "mixer device 22".

Further, an element such as "expanded dispersion delay line 21", "mixer device 22", and "compression dispersion delay line 23" shown in Fig. 2 of the present invention can be formed on a printed circuit board by a semiconductor element. Board, PCB) on the way to facilitate implementation. In practice, the present invention uses a "microstrip line" in a printed circuit board, that is, a "band signal line" is used to transmit a signal.

Referring to Fig. 2, the input of the "mixer of radio-frequency signal" is searched for at the input end of the "mixer system 20" of the present invention shown in Fig. 2. In the less dispersed "Diffuse Dispersion Delay Line (D.D.L) 21", it may not be completely segregation. Bandwidth, but the "expanded dispersion delay line 21" can expand the "cluster of radio-frequency signal" in the time domain, that is, it can reduce the amplitude of the signal, and increase The function of the time extension of the signal, therefore, because the nonlinear modulation of the "mixer device 22" is greatly reduced, and the power handling capability of the "mixer device 22" is further reduced due to the reduction of the modulation behavior. ) and can be increased.

Therefore, as shown in Fig. 2, the present invention increases the DC power conversion efficiency of the "mixer device 22". In other words, the "mixer system 20" of the present invention can simulate the use of a grating (grating). ), optical pulse amplification of a dispersive structure. However, the "expansion dispersion delay line 21" and the "compression dispersion delay line 23" may be considered to use a microwave component. Finally, the "mixer system 20" structure of the present invention will be implemented in a semiconductor format.

Please refer to FIG. 3, which is a schematic diagram of an embodiment of the expanded dispersion delay line of the present invention. The "expanded dispersion delay line 21" of the present invention is mainly composed of a parallel open stub of the signal layer and its corresponding "ground plane slot line", and the "ground plane slot line" can compensate for "signal layer parallel stubs" The resulting zero point makes the frequency response of the "signal layer parallel stub" an all-pass response. Regarding the "mixer device 22", it has the impedance of maximum power transmission, but in fact, the power gain of a "mixer device 22" may also depend on the power source impedance and load impedance used, as well as including internal Voltage/current gain.

It is to be noted that Fig. 4 is a schematic view showing an embodiment of the "compression dispersion delay line" of the present invention. The "compression dispersion delay line 23" is a "dispersive delay line (DDL)", and the "compression dispersion delay" is compared with the group delay profile of the aforementioned "dispersion delay line". Line 23" is the opposite way. Therefore, the total delay time of both the "expanded dispersion delay line 21" and the "compressed dispersion delay line 23" will be the same as all three freduency bands in the f ₁ , f ₂ , f ₃ cores. . Physically, if the "dispersion delay line" produces an up-chirped signal, the corresponding "compressed dispersion delay line 23" will produce a downward chirp signal (down). -chirped) and vice versa.

As still shown in FIGS. 3 and 4, the "expanded dispersion delay line 21" and the "inverse dispersive delay line (IDDL) 23" of the present invention all have a desired bandwidth. The controllable group delay technique can be used to implement the format of the microstrip delay line. The "expanded dispersion delay line 21" and "compression dispersion delay line 23" components can also form a conventional splitter, band-pass filter, combiner, and general delay line. (common delay line).

As shown in Figure 2, for some practical applications, it seems that the RF signal isolation is not welcome because it will extend the "RF signal expansion" in the time domain. In this case, the "compressed dispersion delay line 23" can be used to compress the spread RF signal so that the output of the mixer system and the input of the cluster of radio-frequency signal can be the same.

In summary, the "mixer system 20" of the present invention includes: "expanded dispersion delay line 21", "mixer device 22", wherein the "expanded dispersion delay line 21" is placed in "mixing wave" The input of the device 22" and the "compression dispersion delay line 23", wherein the "compression dispersion delay line 23" is placed at the output of the "mixer (amplifier device) 22".

As shown in FIG. 2, the method of using a mixer system of the present invention first inputs a "microwave group signal" to an "expanded dispersion delay line (DDL) 21" at a signal input end, and then transmits the "expansion" The dispersion dispersion delay line 21" expands the microwave group pulse signal into a time domain and becomes a "dispersive pulse" signal for performing a "broadened pulse" output according to the principle of conservation of energy. The amplitude of the scattered pulse is reduced, thereby reducing the amplitude of the extended microwave group pulse.

Still using the method of using a mixer system of the present invention as shown in FIG. 2, and then feeding the extended microwave group pulse to the "mixer device 22" to amplify the "pulse of the extended microwave group" The amplitude of the pulse waveform signal.

As shown in FIG. 2, a method of using a mixer system of the present invention, finally, a signal having the pulse waveform is sent to a "compression dispersion delay line 23", and the "microwave group signal" of the signal input end is restored. The mode, that is, the amplitude of the pulse waveform signal can be greatly increased.

The mixer system of the present invention and its method of use are applicable to many other parts of the radio frequency system. Moreover, since the present invention has been made to improve the signal processing capability of the "RF frequency level", the architecture of the present invention has improved the signal processing to the "RF frequency level", and in addition, the RF transceiver (RF transceiver) ) It can also be implemented due to practical application areas.

The invention described is also applicable to many other parts of the field of radio frequency systems, and the present invention can reduce the unwanted modulation effects caused by the nonlinear behavior of the active device. Moreover, the present invention can greatly reduce the electric power required for the mixer system, for example, the electrical power of 3 Watts originally required to be used. After the implementation of the mixer system of the present invention, only 1 watt is required. It can reach a third of the original electric power and has a high energy-saving effect.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention; all other equivalent changes or modifications which are not departing from the spirit of the present invention should be included in the following. Within the scope of the patent application.

Claims (4)

A mixer system having an extended dispersion delay line, a mixer device, and a compression dispersion delay line formed on a printed circuit board using a microstrip signal line, comprising: an expanded dispersion delay line, the expanded dispersion The delay line has the function of reducing an amplitude of a signal and increasing the time extension of the signal, the extended dispersion delay line having a controllable group delay function exceeding a desired bandwidth. To implement a format of a microstrip delay line; a mixer device having a characteristic impedance group of maximum power transmission, wherein the dispersion delay line is placed An input of the mixer device; and a compression-type dispersion delay line having a function of exceeding the controllable group delay of the desired bandwidth to implement the format of the microstrip delay line The compressed dispersion delay line is disposed at an output of the mixer device, wherein the extended dispersion delay line, the mixer device, and the compression type Bulk delay line based on a printed circuit board using a signal microstrip line (microstrip line) for transmitting a signal. The mixer system of claim 1, wherein the mixer system comprises a field suitable for use in a radio frequency system. A method for using a microstrip signal line formed on a printed circuit board with an extended dispersion delay line, a mixer device, and a compression dispersion delay line, comprising: inputting a microwave at a signal input end The group signal is extended to an extended dispersion delay line; a microwave group pulse signal is extended through the extended dispersion delay line to become a dispersion pulse signal in a time domain to perform an extended pulse (broadened Output of pulse), reducing an amplitude of an extended microwave group pulse; feeding the extended microwave group pulse to a mixer device to amplify the extended microwave group a set of amplitudes of a pulse waveform signal; and the signal sent to the pulse waveform having the extended microwave group to a compression dispersion delay line, the microwave at the signal input end being recovered a mode of the group signal, wherein the extended dispersion delay line, the mixer device, and the compression dispersion delay line are used in a printed circuit board to transmit a signal using a microstrip signal line, the extended dispersion One of the delay profiles of the delay line is the opposite of the other group delay profile of the compressed dispersion delay line. The mixer system of claim 3, wherein the mixer system comprises a field suitable for use in a radio frequency system.