Pilot frequency dividing circuit for cellular communication carrier aggregation

Abstract

The utility model provides a pilot frequency dividing circuit for cellular communication carrier aggregation, which relates to the technical field of cellular communication, and is characterized in that a first LC discrete device is used for filtering out signals of more than 2690MHz in carrier aggregation signals, a second LC discrete device is used for filtering out signals of less than 1805MHz, a band-pass filter is used for carrying out frequency division on the signals between 1805MHz and 2690MHz to obtain a Band1 signal, a Band3 signal and a Band7 signal, and the Band7 signal is used for carrying out frequency division on the signals between 1805MHz and 2690MHz. The first LC discrete device is used for filtering out signals of 1496MHz or above in the signals filtered by the first LC discrete device, the third LC discrete device is used for filtering out signals of 1496MHz or above in the signals filtered by the first LC discrete device, the low-pass filter is used for filtering out-of-band signals of a Band32 frequency band to obtain Band32 signals, and impedance of each signal line is adjusted through the fourth LC discrete device, the fifth LC discrete device, the sixth LC discrete device and the seventh LC discrete device to obtain the Band32 signals. Therefore, a Band1 signal, a Band3 signal, a Band7 signal and a Band32 signal suitable for radio frequency communication are obtained, the problem of frequency division of carrier aggregation signals composed of the Band1 signal, the Band3 signal, the Band7 signal and the Band32 signal is solved, and the method is suitable for cellular communication.

Description

Technical Field

[0001] The utility model relates to the technical field of cellular communication, in particular to a different-frequency frequency division circuit for carrier aggregation in cellular communication. Background Art

[0002] In cellular communication, carrier aggregation (CA) technology is usually introduced to improve network speed and bandwidth. Its essence is to combine two or more carriers (or frequency bands) together, so as to increase the system transmission bandwidth and better support high-speed data transmission.

[0003] For a carrier aggregation signal composed of Band1, Band3, Band7, and Band32, where the downlink frequency range of Band1 is 2110 - 2170 MHz, the downlink frequency range of Band3 is 1805 - 1880, the downlink frequency range of Band7 is 2620 - 2690 MHz, and the downlink frequency range of Band32 is 1452 - 1496 MHz, there is currently no integrated device that can perform frequency division on the above carrier aggregation signal. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model: Provide a different-frequency frequency division circuit for carrier aggregation in cellular communication to solve the problem of frequency division of a carrier aggregation signal composed of Band1, Band3, Band7, and Band32.

[0005] The technical solution adopted by the utility model to solve the above technical problem: A different-frequency frequency division circuit for carrier aggregation in cellular communication includes a first LC discrete device, a second LC discrete device, a third LC discrete device, a fourth LC discrete device, a fifth LC discrete device, a sixth LC discrete device, a seventh LC discrete device, a band-pass filter, and a low-pass filter;

[0006] The first LC discrete device is respectively connected to the second LC discrete device and the third LC discrete device, the second LC discrete device is connected to the band-pass filter, the band-pass filter is respectively connected to the fourth LC discrete device, the fifth LC discrete device, and the sixth LC discrete device, the third LC discrete device is connected to the low-pass filter, and the low-pass filter is connected to the seventh LC discrete device;

[0007] The first LC discrete device is used to filter out signals above 2690 MHz, the second LC discrete device is used to filter out signals below 1805 MHz, the band-pass filter is used to divide the signals between 1805 MHz and 2690 MHz to obtain Band1 signal, Band3 signal and Band7 signal, the fourth LC discrete device is used to adjust the impedance of the Band1 signal line, the fifth LC discrete device is used to adjust the impedance of the Band3 signal line, and the sixth LC discrete device is used to adjust the impedance of the Band7 signal line;

[0008] The third LC discrete device is used to filter out signals above 1496 MHz, the low-pass filter is used to filter out the out-of-band signals in the Band32 frequency band to obtain the Band32 signal, and the seventh LC discrete device adjusts the impedance of the Band32 signal line.

[0009] Further, the circuit further includes a receiving antenna, a medium-high frequency filter, a low-noise signal amplifier and a radio frequency transceiver. The receiving antenna is connected to the medium-high frequency filter, the medium-high frequency filter is connected to the first LC discrete device, the fourth LC discrete device, the fifth LC discrete device, the sixth LC discrete device and the seventh LC discrete device are all connected to the low-noise signal amplifier, the low-noise signal amplifier is connected to the radio frequency transceiver, the receiving antenna is used to receive the carrier aggregation signal, the medium-high frequency filter is used to filter out the medium-high frequency signals, the low-noise signal amplifier is used to amplify the Band1 signal, Band3 signal, Band7 signal and Band32 signal, and the radio frequency transceiver is used to analyze the signals amplified by the low-noise signal amplifier.

[0010] Further, the impedances of the Band1 signal line, the Band3 signal line, the Band7 signal line and the Band32 signal line are all 50 ohms.

[0011] Advantages of the present utility model: The present utility model provides a heterogenous frequency division circuit for carrier aggregation in cellular communication. The first LC discrete device filters out signals above 2690 MHz in the carrier aggregation signal, the second LC discrete device filters out signals below 1805 MHz, the band-pass filter divides the signals between 1805 MHz and 2690 MHz to obtain Band1 signal, Band3 signal and Band7 signal, the third LC discrete device filters out signals above 1496 MHz in the signals filtered by the first LC discrete device, the low-pass filter filters out the out-of-band signals in the Band32 frequency band to obtain the Band32 signal, and then the impedance of each signal line is adjusted through the fourth LC discrete device, the fifth LC discrete device, the sixth LC discrete device and the seventh LC discrete device, so as to obtain the Band1 signal, Band3 signal, Band7 signal and Band32 signal applicable to radio frequency communication, solving the problem of frequency division of the carrier aggregation signal composed of Band1, Band3, Band7 and Band32, and moreover, the miniaturization of the circuit can be realized. Description of the Drawings

[0012] Figure 1 is a schematic circuit structure diagram of a heterogenous frequency division circuit for carrier aggregation in cellular communication provided by the present utility model;

[0013] Figure 2 is a schematic circuit structure diagram of an application scenario of a heterogenous frequency division circuit for carrier aggregation in cellular communication provided by the present utility model. Detailed Embodiments

[0014] Aiming at the problem of frequency division of the carrier aggregation signal composed of Band1, Band3, Band7 and Band32, the present utility model provides a heterogenous frequency division circuit for carrier aggregation in cellular communication, as Figure 1 shown, which includes a first LC discrete device, a second LC discrete device, a third LC discrete device, a fourth LC discrete device, a fifth LC discrete device, a sixth LC discrete device, a seventh LC discrete device, a band-pass filter and a low-pass filter; the first LC discrete device is respectively connected to the second LC discrete device and the third LC discrete device, the second LC discrete device is connected to the band-pass filter, the band-pass filter is respectively connected to the fourth LC discrete device, the fifth LC discrete device and the sixth LC discrete device, the third LC discrete device is connected to the low-pass filter, and the low-pass filter is connected to the seventh LC discrete device;

[0015] The first LC discrete device is used to filter signals above 2690 MHz, the second LC discrete device is used to filter signals below 1805 MHz, the band-pass filter is used to divide the signals between 1805 MHz and 2690 MHz to obtain Band1 signal, Band3 signal and Band7 signal, the fourth LC discrete device is used to adjust the impedance of the Band1 signal line, the fifth LC discrete device is used to adjust the impedance of the Band3 signal line, and the sixth LC discrete device is used to adjust the impedance of the Band7 signal line; the third LC discrete device is used to filter signals above 1496 MHz, the low-pass filter is used to filter out-of-band signals in the Band32 frequency band to obtain the Band32 signal, and the seventh LC discrete device adjusts the impedance of the Band32 signal line.

[0016] Since the first LC discrete device, the second LC discrete device, the third LC discrete device, the fourth LC discrete device, the fifth LC discrete device, the sixth LC discrete device, the seventh LC discrete device, the band-pass filter and the low-pass filter can all adopt micro-devices, the miniaturization of the circuit can be achieved.

[0017] Specifically, the impedance of the Band1 signal line, the impedance of the Band3 signal line, the impedance of the Band7 signal line and the impedance of the Band32 signal line respectively adjusted by the fourth LC discrete device, the fifth LC discrete device, the sixth LC discrete device and the seventh LC discrete device are all 50 ohms.

[0018] For the above-mentioned heterodyne frequency division circuit for cellular communication carrier aggregation, in actual application, as Figure 2 shown, it further includes a receiving antenna, a medium-high frequency filter, a low-noise signal amplifier and a radio frequency transceiver. The receiving antenna is connected to the medium-high frequency filter, the medium-high frequency filter is connected to the first LC discrete device, the fourth LC discrete device, the fifth LC discrete device, the sixth LC discrete device and the seventh LC discrete device are all connected to the low-noise signal amplifier, the low-noise signal amplifier is connected to the radio frequency transceiver. The receiving antenna is used to receive the carrier aggregation signal, the medium-high frequency filter is used to filter out the medium-high frequency signal, the low-noise signal amplifier is used to amplify the Band1 signal, the Band3 signal, the Band7 signal and the Band32 signal, and the radio frequency transceiver is used to analyze the signal amplified by the low-noise signal amplifier.

[0019] The heterodyne frequency division circuit for cellular communication carrier aggregation provided by the present invention can also be used in parallel with low frequency and ultra-high frequency, that is, a low-frequency signal processing circuit and a high-frequency signal processing circuit are added after the receiving antenna, such as filtering out Sub6G signals from high-frequency signals.

Claims

1. A frequency division circuit for cellular communication carrier aggregation, characterized in that: including a first LC discrete device, a second LC discrete device, a third LC discrete device, a fourth LC discrete device, a fifth LC discrete device, a sixth LC discrete device, a seventh LC discrete device, a band-pass filter and a low-pass filter; The first LC discrete device is connected to the second LC discrete device and the third LC discrete device respectively, the second LC discrete device is connected to a bandpass filter, the bandpass filter is connected to the fourth LC discrete device, the fifth LC discrete device and the sixth LC discrete device respectively, the third LC discrete device is connected to a low-pass filter, and the low-pass filter is connected to the seventh LC discrete device; The first LC discrete device is used to filter out signals above 2690 MHz, the second LC discrete device is used to filter out signals below 1805 MHz, the bandpass filter is used to divide the signal between 1805 MHz and 2690 MHz to obtain Band 1 signal, Band 3 signal and Band 7 signal, the fourth LC discrete device is used to adjust the impedance of the Band 1 signal line, the fifth LC discrete device is used to adjust the impedance of the Band 3 signal line, and the sixth LC discrete device is used to adjust the impedance of the Band 7 signal line; The third LC discrete device is used to filter out signals above 1496 MHz, the low-pass filter is used to filter out out-of-band signals in the Band32 frequency band to obtain the Band32 signal, and the seventh LC discrete device adjusts the impedance of the Band32 signal line.

2. The heterodyne frequency division circuit for cellular communication carrier aggregation according to claim 1, characterized in that: It also includes a receiving antenna, a medium and high frequency filter, a low noise signal amplifier and a radio frequency transceiver, the receiving antenna is connected to the medium and high frequency filter, the medium and high frequency filter is connected to the first LC discrete device, the fourth LC discrete device, the fifth LC discrete device, the sixth LC discrete device and the seventh LC discrete device are all connected to the low noise signal amplifier, the low noise signal amplifier is connected to the radio frequency transceiver, the receiving antenna is used to receive carrier aggregation signals, the medium and high frequency filter is used to filter out medium and high frequency signals, the low noise signal amplifier is used to amplify Band 1 signals, Band 3 signals, Band 7 signals and Band 32 signals, and the radio frequency transceiver is used to analyze the signals amplified by the low noise signal amplifier.

3. The heterodyne frequency division circuit for cellular communication carrier aggregation according to claim 1 or 2, characterized in that: The impedance of the Band 1 signal line, the impedance of the Band 3 signal line, the impedance of the Band 7 signal line, and the impedance of the Band 32 signal line are all 50 ohms.

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