Dual-channel multi-band frequency-selecting filter device

Abstract

The utility model relates to the field of filter devices, in particular to a dual-channel multiband frequency-selecting filter device, which comprises a filter, a radio frequency switch and a control unit. The filter is used for meeting the requirement that microwave signals with specific frequency and bandwidth generate resonance and pass through the resonance, and reflecting and absorbing signals with other frequencies, so that the filtering effect is realized; the radio frequency switch is used for controlling a path of a signal in a radio frequency circuit and can transmit or block a radio frequency signal, and switching and selection of the signal are realized by controlling the state of the radio frequency switch; in order to guarantee effective communication of wireless communication equipment in a complex electromagnetic environment, a plurality of filters and radio frequency switches are adopted, and the frequency bands of the filters are manually or automatically adjusted; the purpose of switching the filter, the manual switching mode, the numerical control switching mode and the dual-channel multi-band frequency-selecting filter is achieved, the large working frequency range of wireless communication equipment is guaranteed, and the purposes of reducing noise and improving communication quality are achieved.

Description

Technical Field

[0001] The utility model relates to the field of filter devices, in particular to a dual-channel multi-band frequency-selective filter device. Background Art

[0002] Wireless communication devices may encounter various interference issues in complex electromagnetic environments, affecting the communication performance of the devices. The shortcomings of existing technologies include:

[0003] 1. The operating range is limited to one frequency band, and encountering interference signals with a large bandwidth will affect normal operation;

[0004] 2. The multi-band operation mode of multiple modules and multiple amplifiers has high power consumption, volume and cost;

[0005] 3. Using filters to increase out-of-band suppression limits the operating frequency range of the equipment and loses flexibility.

[0006] Therefore, to address the above-mentioned problem of being unable to ensure effective communication of wireless communication equipment in a complex electromagnetic environment, a dual-channel multi-band frequency-selective filter device can be designed. Utility Model Content

[0007] In order to overcome the problem of being unable to ensure effective communication of wireless communication equipment in complex electromagnetic environments.

[0008] The technical solution of the utility model is: a dual-channel multi-band frequency selection filter device, including a filter, a radio frequency switch, a control unit, a radio frequency interface, a power interface, a numerical control interface, and a band switch; characterized in that:

[0009] The filter is used to resonate and pass microwave signals of a specific frequency and bandwidth, and reflect and absorb other frequency signals, thereby achieving a filtering effect;

[0010] RF switches are used to control the signal path in RF circuits. They can transmit or block RF signals. By controlling the state of the RF switch, signal switching and selection can be achieved.

[0011] One RF switch has five RF interfaces;

[0012] The RF interface is divided into input interface and output interface;

[0013] A RF switch also has 4 pins, corresponding to the opening or closing of 4 input or output interfaces;

[0014] The power interface is used to supply power to the device;

[0015] The control unit is used to control the output of DC 12V, thereby driving the control unit;

[0016] The CNC interface is used to connect 2 external TTL levels and is internally connected to the control unit. The wireless communication device can achieve automatic control functions by outputting different TTL levels.

[0017] The band switch is used to select and switch between different circuits. It is divided into 4 gears by switching the band switch.

[0018] Preferably, the filter is used to resonate and pass microwave signals of a specific frequency and bandwidth, and reflect and absorb other frequency signals, thereby achieving a filtering effect;

[0019] An RF switch is used to control the signal path in an RF circuit. It can transmit or block RF signals, and by controlling the state of the RF switch, signal switching and selection can be achieved. An RF switch has five RF interfaces, with one input interface corresponding to four output interfaces or one output interface corresponding to four input interfaces. An RF switch also has four pins, corresponding to the opening or closing of the four input or output interfaces, and is driven by 12V.

[0020] The RF interface is divided into an input interface and an output interface. The RF input interface is used to connect to wireless communication equipment, and the output interface is used to connect to the antenna. The device has two input interfaces and two output interfaces, a total of two channels, which can be applied to dual-antenna dual-channel wireless communication equipment;

[0021] The power interface is used to power the device, and the supply voltage is DC12V;

[0022] The band switch is used to select and switch between different circuits. It has four levels. By switching the band switch, DC 12V can be output to one of the four pins of the RF switch, thereby driving the RF switch to open the corresponding RF channel and connect to the corresponding filter.

[0023] The control unit functions like a band switch, controlling the DC 12V output to drive the RF switch. The difference is that the action input comes from two TTL levels, with 00, 01, 10, and 11 corresponding to the four-speed switching action, thus connecting to different filters.

[0024] The CNC interface is used to connect 2 external TTL levels and is internally connected to the control unit. The wireless communication device can achieve automatic control functions by outputting different TTL levels.

[0025] Preferably, the filter has 2 input interfaces and 2 output interfaces, 2 channels in total, and is applicable to wireless communication equipment with dual antennas and dual channels.

[0026] Preferably, the power supply voltage of the power interface is DC12V.

[0027] Preferably, the radio frequency input interface is used to connect to a wireless communication device, and the output interface is used to connect to an antenna.

[0028] Beneficial effects of the utility model:

[0029] In order to ensure the effective communication of wireless communication equipment in a complex electromagnetic environment, the utility model adopts multiple filters and radio frequency switches, and manually or automatically adjusts the frequency band of the filter, thereby achieving the purpose of switchable filters, manual switching and digital control switching modes, and dual-channel multi-band frequency selection filters, thereby ensuring a larger operating frequency range of wireless communication equipment, reducing noise, and improving communication quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Shown is a structural diagram of the filter device of the present utility model;

[0031] Figure 2 Shown is an illustration of the operation relationship of the filter device of the present invention when switching to the f1 frequency band working mode;

[0032] Figure 3 Shown is an illustration of the operation relationship of the filter device of the present invention when switching to the f2 frequency band working mode;

[0033] Figure 4 Shown is an illustration of the operation relationship of the filter device of the present invention when switching to the f3 frequency band working mode;

[0034] Figure 5 Shown is an explanatory diagram of the operation relationship of the filter device of the present invention when switching to the f4 frequency band working mode;

[0035] Figure 6 Shown is the appearance diagram of the filter device of the present utility model;

[0036] Figure 7 Shown is a schematic diagram of the interface of the filter device of the present invention. DETAILED DESCRIPTION

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0038] See also Figure 1-7 The present invention provides an embodiment: a dual-channel multi-band frequency selection filter device, including a filter, a radio frequency switch, a control unit, a radio frequency interface, a power interface, a numerical control interface, and a band switch; characterized in that:

[0039] The filter is used to resonate and pass microwave signals of a specific frequency and bandwidth, and reflect and absorb other frequency signals, thereby achieving a filtering effect;

[0040] RF switches are used to control the signal path in RF circuits. They can transmit or block RF signals. By controlling the state of the RF switch, signal switching and selection can be achieved.

[0041] One RF switch has five RF interfaces;

[0042] The RF interface is divided into input interface and output interface;

[0043] A RF switch also has 4 pins, corresponding to the opening or closing of 4 input or output interfaces;

[0044] The power interface is used to supply power to the device;

[0045] The control unit is used to control the output of DC 12V, thereby driving the control unit;

[0046] The CNC interface is used to connect 2 external TTL levels and is internally connected to the control unit. The wireless communication device can achieve automatic control functions by outputting different TTL levels.

[0047] The band switch is used to select and switch between different circuits. It is divided into 4 gears by switching the band switch.

[0048] Preferably, the filter has 2 input interfaces and 2 output interfaces, 2 channels in total, and is applicable to wireless communication equipment with dual antennas and dual channels.

[0049] Preferably, the power supply voltage of the power interface is DC12V.

[0050] Preferably, the radio frequency input interface is used to connect to a wireless communication device, and the output interface is used to connect to an antenna.

[0051] See also Figure 2 In this embodiment, the frequency band is switched to f1: when the band switch is turned to f1, the control unit outputs 12V to pin 1 of the RF switch, and the RF switch turns on the f1 filter.

[0052] See also Figure 3 In this embodiment, the frequency band is switched to f2: when the band switch is turned to f2, the control unit outputs 12V to pin 2 of the RF switch, and the RF switch turns on the f2 filter.

[0053] See also Figure 4 In this embodiment, the frequency band is switched to f3: when the band switch is turned to f3, the control unit outputs 12V to pin 3 of the RF switch, and the RF switch turns on the f3 filter.

[0054] See also Figure 5In this embodiment, the frequency band is switched to f4: when the band switch is turned to f4, the control unit outputs 12V to pin 4 of the RF switch, and the RF switch turns on the f4 filter.

[0055] Working principle: The filter is used to resonate and pass microwave signals with a specific frequency and bandwidth, and reflect and absorb other frequency signals, thereby achieving a filtering effect;

[0056] An RF switch is used to control the signal path in an RF circuit. It can transmit or block RF signals, and by controlling the state of the RF switch, signal switching and selection can be achieved. An RF switch has five RF interfaces, with one input interface corresponding to four output interfaces or one output interface corresponding to four input interfaces. An RF switch also has four pins, corresponding to the opening or closing of the four input or output interfaces, and is driven by 12V.

[0057] The RF interface is divided into an input interface and an output interface. The RF input interface is used to connect to wireless communication equipment, and the output interface is used to connect to the antenna. The device has two input interfaces and two output interfaces, a total of two channels, which can be applied to dual-antenna dual-channel wireless communication equipment;

[0058] The power interface is used to power the device, and the supply voltage is DC12V;

[0059] The band switch is used to select and switch between different circuits. It has four levels. By switching the band switch, DC 12V can be output to one of the four pins of the RF switch, thereby driving the RF switch to open the corresponding RF channel and connect to the corresponding filter.

[0060] The control unit functions like a band switch, controlling the DC 12V output to drive the RF switch. The difference is that the action input comes from two TTL levels, with 00, 01, 10, and 11 corresponding to the four-speed switching action, thus connecting to different filters.

[0061] The CNC interface is used to connect 2 external TTL levels and is internally connected to the control unit. The wireless communication device can achieve automatic control functions by outputting different TTL levels.

[0062] Table 1 Dual-channel multi-band frequency selective filter device panel interface definition table

[0063]

[0064] Table 2 Definition table of channel selection code for dual-channel multi-band frequency selective filter device

[0065]

[0066]

[0067]

[0068] Table 3 Parameters of dual-channel multi-band frequency selective filter device 4-way high-power low insertion loss high isolation RF switch

[0069] parameter Technical indicators Working frequency band MHz 500-800 Input loss dB ≤0.4 Isolation dB ≥40 Return loss dB ≥16 Input power 50Wmax Operating voltage 12V, 10mA control signal TTL

Claims

1. A dual-channel multi-band frequency-selective filter device, comprising a filter, a radio frequency switch, a control unit, a radio frequency interface, a power interface, a numerical control interface, and a band switch; characterized in that: The filter is used to resonate and pass microwave signals of a specific frequency and bandwidth, and reflect and absorb other frequency signals, thereby achieving a filtering effect; RF switches are used to control the signal path in RF circuits. They can transmit or block RF signals. By controlling the state of the RF switch, signal switching and selection can be achieved. One RF switch has five RF interfaces; The RF interface is divided into input interface and output interface; A RF switch also has 4 pins, corresponding to the opening or closing of 4 input or output interfaces; The power interface is used to supply power to the device; The control unit is used to control the output of DC 12V, thereby driving the control unit; The CNC interface is used to connect 2 external TTL levels and is internally connected to the control unit. The wireless communication device can achieve automatic control functions by outputting different TTL levels. The band switch is used to select and switch between different circuits. It is divided into 4 gears by switching the band switch. The filter has 2 input interfaces and 2 output interfaces, a total of 2 channels, and can be applied to wireless communication equipment with dual antennas and dual channels. The RF input interface is used to connect to the wireless communication equipment, and the output interface is used to connect to the antenna.

2. The dual-channel multi-band frequency selective filter device according to claim 1, characterized in that: The power supply voltage of the power interface is DC12V.

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