CN210640872U - Millimeter wave local oscillator component - Google Patents
Millimeter wave local oscillator component Download PDFInfo
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- CN210640872U CN210640872U CN201921902242.4U CN201921902242U CN210640872U CN 210640872 U CN210640872 U CN 210640872U CN 201921902242 U CN201921902242 U CN 201921902242U CN 210640872 U CN210640872 U CN 210640872U
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- local oscillator
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- millimeter wave
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Abstract
The utility model discloses a millimeter wave local oscillator subassembly, divide the ware including loop filter, constant temperature crystal oscillator and the two merits that connect gradually, local oscillator signal divides the ware to divide into two the way through two merits, and signal is divided ware, band pass filter and amplifier A output through phase-locked loop A, frequency multiplier, 8 way merits that connect gradually all the way, and another way signal phase-locked loop B, digital attenuator and amplifier B output that connect gradually. The utility model discloses can satisfy the demand of extensive system to multichannel local oscillator signal, the reliability is higher.
Description
Technical Field
The utility model relates to the field of communication technology, especially, relate to a millimeter wave local oscillator subassembly.
Background
With the rapid development of mobile communication technology, higher requirements are put on the speed of data processing and transmission. In various communication transceiving systems, the quality of a frequency source has an important influence on the system performance, and in a large-scale MIMO communication system, a greater challenge is provided for the performance of a local oscillator signal.
The local oscillator module and the receiving and transmitting system are independent from each other, so that local oscillator leakage can be effectively inhibited, the area of the receiving and transmitting system is reduced, each module can be more flexible, and debugging and later maintenance are facilitated. Considering factors such as system performance and cost, the external local oscillator is a common choice in modern mobile communication systems.
The existing local oscillator assembly has single function, cannot meet the requirement of multiple channels and has low reliability.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists among the prior art, the utility model provides a millimeter wave local oscillator subassembly can satisfy the multichannel demand, and the reliability is high.
In order to achieve the above object, the present invention provides the following technical solutions.
The utility model provides a millimeter wave local oscillator subassembly, includes that loop filter, constant temperature crystal oscillator, two merit divide ware, phase-locked loop, frequency multiplier, 8 way merit to divide ware, band pass filter, amplifier and digital attenuator, loop filter, constant temperature crystal oscillator and two merit divide the ware to connect gradually, and local oscillator signal divides the ware to divide into two ways through two merits, and signal is divided ware, band pass filter and amplifier A output through phase-locked loop A, frequency multiplier, 8 way merit that connect gradually all the way, and another way signal phase-locked loop B, digital attenuator and amplifier B that connect gradually export.
Further, the loop filter adopts a third-order passive loop filter.
Further, the band pass filter adopts an LTCC band pass filter.
Further, the amplifier adopts a broadband general amplifier MAAM-011101.
Compared with the prior art, the utility model has the advantages that: the utility model adopts a two-way power divider and an 8-way power divider, so that the number of local oscillation signals is increased, and the requirement of a large-scale system on multi-channel local oscillation signals is met; the utility model discloses an oven controlled crystal oscillator for local oscillator subassembly interference immunity is better, and the reliability is higher.
Drawings
Fig. 1 is a schematic structural diagram of a millimeter wave local oscillator module according to the present invention;
fig. 2 is a topology structure diagram of the third-order passive loop filter of the present invention;
fig. 3 is a circuit diagram of the amplifier of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description, but it should not be understood that the scope of the above subject matter is limited to the following examples, and all the technologies realized based on the present invention are within the scope of the present invention.
As shown in fig. 1, a millimeter wave local oscillator module includes a loop filter, an oven controlled crystal oscillator, a two-way power divider, a phase-locked loop, a frequency multiplier, an 8-way power divider, a band-pass filter, an amplifier, and a digital attenuator, wherein a local oscillator signal is filtered by the loop filter, enters the oven controlled crystal oscillator to generate a stable signal, and then enters the two-way power divider, and the signal is divided into two paths; after the phase of one path of signal is locked by a phase-locked loop A, the frequency of the signal is increased by a frequency multiplier, the signal enters an 8-path power divider, is filtered by a band-pass filter, is amplified by an amplifier A and is output by a radio frequency signal output end Fout 1; and the other path of signal is subjected to phase locking by a phase-locked loop B, is adjusted by a digital attenuator, is amplified by an amplifier B and is output by a radio-frequency signal output end Fout 2.
The local oscillator module in this embodiment adopts two-way output to satisfy multiple demands, and can switch according to operating conditions. The 8-path power divider generates 8-path signals, and can meet the requirements of large-scale systems with 64 paths, 128 paths or more paths on local oscillators. The use of the amplifier allows the output power to meet the requirements. The constant temperature crystal oscillator adopts the constant temperature groove to keep the temperature of the crystal oscillator constant, and the influence of the change of the external ambient temperature on the output frequency is small.
Because the bandwidth of the loop filter affects the stray, jitter, and phase-locked time of the system, the loop filter in this embodiment uses a third-order passive loop filter, as shown in fig. 2, which is a topology structure diagram of the third-order passive loop filter, the capacitor C1 is grounded, the resistor R1 and the capacitor C2 are grounded after being connected in series, and the capacitor C3 is grounded. The topological structure reduces the bandwidth of the loop filter under the condition of ensuring the stable locking of the system, and the third-order passive loop filter can better inhibit the high-frequency interference outside the loop bandwidth frequency.
The band-pass filter is an LTCC band-pass filter of Mini-Circuits, the pass band is 6650-7950MHz, and the maximum insertion loss in the band-pass is 3.5 dB.
The amplifier adopts a broadband general amplifier MAAM-011101 of Macon company, and FIG. 3 is a circuit diagram of the amplifier.
The millimeter wave local oscillator component provided by the present invention is introduced in detail, and the description of the above embodiment is only used to help understanding the method and the core idea of the present invention; while the invention has been described in terms of specific embodiments and applications, it will be apparent to those skilled in the art that numerous variations and modifications can be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (4)
1. A millimeter wave local oscillator subassembly which characterized in that: divide ware, phase-locked loop, frequency multiplier, 8 way merits to divide ware, band pass filter, amplifier and digital attenuator including loop filter, constant temperature crystal oscillator, two merits, loop filter, constant temperature crystal oscillator and two merits divide the ware to connect gradually, and local oscillator signal divides the ware to divide into two ways through two merits, and signal is divided ware, band pass filter and amplifier A output through phase-locked loop A, frequency multiplier, 8 way merits that connect gradually all the way, and phase-locked loop B, digital attenuator and the output of amplifier B that another way signal connects gradually.
2. The millimeter wave local oscillator assembly of claim 1, wherein: the loop filter adopts a third-order passive loop filter.
3. The millimeter wave local oscillator assembly of claim 1, wherein: the band-pass filter adopts an LTCC band-pass filter.
4. The millimeter wave local oscillator assembly of claim 1, wherein: the amplifier adopts a broadband general amplifier MAAM-011101.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921902242.4U CN210640872U (en) | 2019-11-06 | 2019-11-06 | Millimeter wave local oscillator component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921902242.4U CN210640872U (en) | 2019-11-06 | 2019-11-06 | Millimeter wave local oscillator component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210640872U true CN210640872U (en) | 2020-05-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921902242.4U Active CN210640872U (en) | 2019-11-06 | 2019-11-06 | Millimeter wave local oscillator component |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210640872U (en) |
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2019
- 2019-11-06 CN CN201921902242.4U patent/CN210640872U/en active Active
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