CN218217306U

CN218217306U - L-band low-power-consumption high-linearity multi-channel transceiving frequency conversion assembly

Info

Publication number: CN218217306U
Application number: CN202221682895.8U
Authority: CN
Inventors: 薛明军
Original assignee: Zhongdian Xinyuan Technology Co ltd
Current assignee: Zhongdian Xinyuan Technology Co ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2023-01-03
Anticipated expiration: 2032-06-30

Abstract

The utility model discloses a L wave band low-power consumption, high linearity, multichannel send-receive frequency conversion subassembly, including Y mixer, inductance, electric capacity, wave filter, every receiving channel mixing adopts the Y mixer, L1, C1 establish ties and connect to the RF end of Y mixer as the RF signal input of mixer; l2 and C2 are connected in parallel and are connected in series with C6 to the IF end of the Y mixer to be used as the IF output of the mixer; l4 is connected to VCC end of Y mixer in series, C4 and L4 are connected to VS end of power supply in parallel as power supply input of Y mixer; l3, C3 are connected to LO end of Y mixer in series. 1. The power consumption is low: the system has the functions of 4 down-conversion channels, 1 up-conversion channel, 1 temperature compensation crystal oscillator, 5 local oscillator generation channels, 1 clock generation channel, 1 amplification channel and the like. The channels are multiple, the functions are complex, but the power consumption of the whole product is less than 4W, and the low power consumption index is realized. 2. The linearity is high: the down-conversion gain of the product is 39dB, and when the output power is 0dBm, the two-tone third-order intermodulation suppression is larger than 55dBc.

Description

L-band low-power-consumption high-linearity multi-channel transceiving frequency conversion assembly

Technical Field

The utility model belongs to the technical field of the wireless communication technique and specifically relates to a L wave band low-power consumption, high linearity, multichannel receiving and dispatching frequency conversion subassembly are related to.

Background

The frequency conversion transceiving technology is a core component of modern microwave communication, and a main device of the frequency conversion transceiving technology is a mixer, as shown in the following figure, after a frequency fRF at an RF end and a frequency fLO at an LO end are mixed, a combined frequency m x fRF ± n x fLO (where m =1,2 \8230; n =1,2 \8230; is output) is output, and filtering is performed at an IF end through a suitable filter, so that a required intermediate frequency can be obtained, and a receiving and frequency conversion function is realized. Vice versa, the intermediate frequency can also be up-converted to the radio frequency end through the mixer, so as to realize the transmitting and frequency converting function (as shown in fig. 1);

in modern communication and electronic countermeasure, low power consumption, high linearity, multi-channel transceiver module has been widely used. In the design of the product, the power consumption and the linearity of each component directly affect the power consumption and the linearity of a final product, wherein the input IP3 index of the frequency mixer and the power consumption of a local oscillator related circuit are the problems which need to be considered in a key mode.

The commonly used mixers in the engineering at the present stage are double-balanced mixers, which are classified into an active mixer and a passive mixer, and in the application occasion of low power consumption, the main indexes of the passive mixer are as follows:

frequency conversion loss: 6-10 dB

Local oscillator power: 7 dBm-15 dBm

Input IP3:10 dBm-18 dBm

The passive mixer is widely applied to most occasions, has the advantages of simplicity in use, high isolation and the like, but cannot meet the requirements on occasions requiring high linearity (IP 3 is more than or equal to 25 dBm) and small current (the current is less than 20 mA). If the frequency mixer needs to reach a high input IP3 index, higher local oscillation power is needed, which means that an amplifier with higher power consumption is needed to improve enough local oscillation power for the frequency mixer, and the design target of low power consumption cannot be realized.

Active double balanced mixers draw a large current, typically greater than 50mA, if they achieve high linearity of greater than 25 dBm.

In summary, the currently commonly used double-balanced active and passive mixers have the following disadvantages:

1. on the occasion with strict requirements on power consumption and linearity, the passive double-balanced mixer cannot meet the index requirements at the same time;

2. the active double-balanced mixer has larger power consumption under the condition of meeting high linearity.

Therefore, the L-band low-power consumption, high-linearity and multi-channel transceiving frequency conversion component is provided.

Disclosure of Invention

An object of the utility model is to provide L wave band low-power consumption, high linearity, multichannel receiving and dispatching frequency conversion subassembly, in order to satisfy the requirement to low-power consumption and high linearity, adopt the low-power consumption, the high Y mixer of linearity accomplishes the frequency conversion function, this type of mixer adopts switch diode to realize the mixer function, as shown in fig. 2, its main index is as follows: frequency conversion loss: 6.5dB, input IP3:25dBm, input P-1:19dBm, local oscillator power: 4dBm, current: 3.3v 16.5ma, to solve the problems set forth in the background art described above.

In order to achieve the above purpose, the utility model provides a following technical scheme: the L-band multi-channel transceiving frequency conversion component with low power consumption and high linearity comprises a Y mixer, an inductor, a capacitor and a filter, wherein each receiving channel adopts the Y mixer for mixing, and L1 and C1 are connected to the RF end of the Y mixer in series and used as the RF signal input of the Y mixer; l2 and C2 are connected in parallel and are connected in series with C6 to the IF end of the Y mixer to be used as the IF output of the mixer; l4 is connected to VCC end of Y mixer in series, C4 and L4 are connected to VS end of power supply in parallel as power supply input of Y mixer; l3, C3 are connected in series to the LO terminal of the Y mixer, and connected in series with filter B1 to the external LO terminal as the LO input signal of the mixer.

Preferably, an inductor and a capacitor are adopted as a Y mixer for matching design, and a filter is adopted to improve the isolation between channels.

Compared with the prior art, the beneficial effects of the utility model are that:

the frequency mixer adopting the matching technology realizes the low power consumption and high linearity index of the component, and has the following characteristics:

1. the power consumption is low:

the system has the functions of 4 paths of down-conversion channels, 1 path of up-conversion channels, 1 temperature compensation crystal oscillator, 5 paths of local oscillator generation, 1 path of clock generation, 1 path of amplification channels and the like. The channels are multiple, the functions are complex, but the power consumption of the whole product is less than 4W, and the low power consumption index is realized.

2. The linearity is high:

the down-conversion gain of the product is 39dB, and when the output power is 0dBm, the two-tone third-order intermodulation suppression is larger than 55dBc.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a block diagram of a frequency converter of a prior art mixer;

fig. 2 is a block diagram of the Y mixer of the present invention;

fig. 3 is a Y mixer matching circuit of the present invention;

fig. 4 is the RF matching network topology of the present invention;

fig. 5 shows the simulation result of RF matching according to the present invention.

Fig. 6 is an IF end matching topology of the present invention.

Fig. 7 is an IF terminal simulation curve of the present invention.

Fig. 8 shows a Y mixer according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Referring to fig. 1 to 8, the present invention provides a technical solution:

the L-band multi-channel transceiving frequency conversion component with low power consumption and high linearity comprises a Y mixer, an inductor, a capacitor and a filter, wherein each receiving channel adopts the Y mixer for mixing, and L1 and C1 are connected to the RF end of the Y mixer in series and used as the RF signal input of the Y mixer; l2 and C2 are connected in parallel and are connected in series with C6 to the IF end of the Y mixer to be used as the IF output of the mixer; l4 is connected to VCC end of Y mixer in series, C4 and L4 are connected to VS end of power supply in parallel as power supply input of Y mixer; l3, C3 are connected in series to the LO terminal of the Y mixer and in series with filter B1 to the external LO terminal as the LO input signal of the mixer.

Preferably, an inductor and a capacitor are adopted for matching design of the Y mixer, and a filter is adopted to improve the isolation between channels.

In order to meet the requirements of low power consumption and high linearity, a Y mixer with low power consumption and high linearity is used to implement the frequency conversion function, the mixer adopts a switching diode to implement the mixer function, and the implementation block diagram is shown in fig. 2

The main indexes are as follows:

frequency conversion loss: 6.5dB

Input IP3:25dBm

Input P-1:19dBm

Local oscillator power: 4dBm

Current: 3.3V 16.5mA

The mixer has the advantages of high linearity, low power consumption and the like, but indexes such as isolation degree, standing wave and the like of the mixer need to be matched and isolated by an external matching network, as shown in figure 3

The matching of the RF end can be achieved by software emulation (emulation in 1268.52 MHz), as shown in fig. 4 and 5.

The matching at the IF end can be achieved by software emulation (emulation at 1268.52 MHz), as shown in fig. 4 and 5.

And the local oscillator end matching is obtained by debugging.

By the method, the Y mixer and the matching technology are adopted, and low power consumption and high linearity indexes of the product are achieved. Thereby satisfying all indexes provided by the whole machine.

The working principle is as follows: the utility model discloses a Y mixer matches the design process as follows: l1 and C1 are connected to the RF end of the Y mixer in series, the resonant frequency is the same as the working RF frequency, and the impedance is the lowest during series resonance, so that the frequency of the RF end can be smoothly transmitted to the RF end of the Y mixer; the IF end adopts L2 and C2 and is connected to the IF end of the Y mixer in parallel, the IF end is subjected to DC blocking output through C6, and the resonant frequency of the IF end works between the RF frequency and the LO frequency, so that when the IF end resonates, the impedance to the RF frequency and the LO frequency is maximum, the impedance to the IF is small, the RF frequency and the LO frequency can be effectively prevented from being output through the IF end, and the IF frequency can be smoothly output through the IF end; an LC low-pass filter formed by the L4 and the C4 is connected to a VCC end of the Y mixer, so that radio frequency signals (an RF signal, an LO signal and an IF signal) are prevented from being output through a power supply end, and the power consumption of the Y mixer is minimized by adjusting the L4; l3 and the distributed capacitance of the internal Y mixer form a low-pass filter, LO harmonic waves are filtered, the performance of the mixer is improved, and C3 plays a role in blocking; the B1 filter is connected in series in an LO signal input link, in a multichannel application occasion, the LO signal is realized by adopting a scheme of power division of a power divider, and the B1 filter can reduce the crosstalk of radio frequency signals to signals of other receiving channels through the LO link, thereby playing a role in improving the channel isolation.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.

Claims

L wave band low-power consumption, high linearity, multichannel receiving and dispatching frequency conversion subassembly, including Y mixer, inductance, electric capacity, wave filter, its characterized in that: each receiving channel adopts a Y mixer for mixing, and L1 and C1 are connected in series to the RF end of the Y mixer to be used as the RF signal input of the mixer; l2 and C2 are connected to the IF end of the Y mixer in parallel and are connected to the C6 in series to serve as the IF output of the mixer; l4 is connected to VCC end of Y mixer in series, C4 and L4 are connected to VS end of power supply in parallel as power supply input of Y mixer; l3, C3 are connected in series to the LO terminal of the Y mixer and in series with filter B1 to the external LO terminal as the LO input signal of the mixer.