CN209517075U - It is a kind of by time delay it is small determine band broadband-pass filter - Google Patents
It is a kind of by time delay it is small determine band broadband-pass filter Download PDFInfo
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- CN209517075U CN209517075U CN201920110685.3U CN201920110685U CN209517075U CN 209517075 U CN209517075 U CN 209517075U CN 201920110685 U CN201920110685 U CN 201920110685U CN 209517075 U CN209517075 U CN 209517075U
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Abstract
The utility model discloses it is a kind of by time delay it is small determine band broadband-pass filter, including bandpass filter and connection bandpass filter amplitude equalizer；Band pass filter circuit is connected in series in the equalizing circuit of the amplitude equalizer.The utility model is applied to L band frequency hereinafter, taking the design method that resistance, capacitor, inductance element are added in basic bandpass filter topology, realizes in restriction absolute bandwidth, rectangular degree is higher and signal is required to pass through the small filter that is delayed.
Description
Technical field
This practical bandpass filter for being related to requiring rectangular degree, absolute bandwidth simultaneously and being absolutely delayed, and in particular to one
Kind by time delay it is small determine band broadband-pass filter.
Background technique
Sometimes required that in communication system the output passband absolute bandwidth of intermediate-freuqncy signal required again while a certain range compared with
High rectangular degree and small by delay, intermediate-freuqncy signal is mainly L sections of following frequencies；Because of the attenuation characteristic and delay of filter
Characteristic contradicts, if attenuation characteristic is sharp cut-off, the group delay of cut off can be very big, so guaranteeing rectangle usually
The absolute delay of filter is reduced while spending mostly using the scheme for guaranteeing that amplitude is as flat as possible in signal passband as far as possible, still
If individual filter can not guarantee simultaneously square using with interior scheme as flat as possible in the case where limiting absolute bandwidth
Shape degree and filter pass through delay.
Utility model content
In order to overcome filter in the case where limiting absolute bandwidth while cannot guarantee that rectangular degree and small filter prolong
When, the utility model proposes it is a kind of by time delay it is small determine band broadband-pass filter, i.e., on the basis of former preferred filter topology
The devices such as upper addition resistance, inductance, capacitor, reach filter makes to filter while limiting absolute bandwidth, meeting rectangular degree requirement
The absolute delay of wave device is relatively minimum.
To achieve the goals above, the technical solution that the utility model is taken is as follows:
It is a kind of by time delay it is small determine band broadband-pass filter, including bandpass filter and connection bandpass filter amplitude
Balanced device；
Band pass filter circuit is connected in series in the equalizing circuit of the amplitude equalizer.
The amplitude equalizer includes equalizing circuit part a and equalizing circuit as a further improvement of the utility model,
Part b；
The equalizing circuit part a includes inductance L12, capacitor C10 and resistance R1；The inductance L12 and capacitor C10 are successively
It is connected on band pass filter circuit end；Inductance L12 and capacitor C10 forms series resonance, and resonance frequency is by equalizing circuit
Frequency of heart, it is then in parallel with resistance R1.
The equalizing circuit part b includes resistance R2, resistance R3, capacitor as a further improvement of the utility model,
C11, inductance L13 and resistance R4；
The resistance R2 is in parallel with resistance R1 after connecting with resistance R3；The capacitor C11 is parallel to after connecting with inductance L13
On route between resistance R2 and resistance R3；The inductance L13 and capacitor C11 forms parallel resonance, and resonance frequency is balanced
The centre frequency of circuit, ground connection of then connecting with resistance R4.
The resistance is 0603 type of Samsung as a further improvement of the utility model,；The capacitor is that Dalian Dary is triumphant
Regular senior middle school Q capacitor DLC10A series；The inductance is U.S.'s line skill magnet ring wire-wound inductor.
Compared with prior art, it is had the beneficial effect that acquired by the utility model:
The utility model discloses it is a kind of by time delay it is small determine band broadband-pass filter, bandpass filter and amplitude equalization
Device is combined, the utility model has the beneficial effects that bandpass filter is limiting absolute bandwidth, meeting the same of rectangular degree requirement
When make the delay of filter is opposite to reduce 15% or so.
Detailed description of the invention
Attached drawing 1 is the circuit topology figure of existing conventional design bandpass filter；
Attached drawing 2 is the circuit topology figure of embodiment one；
Attached drawing 3 is vibration frequency, bandwidth, rectangular degree and the curve graph of delay of embodiment one；
Attached drawing 4 is vibration frequency, bandwidth, rectangular degree and the curve graph of delay of existing conventional design bandpass filter.
Specific embodiment
Further details of narration is carried out to the utility model below in conjunction with attached drawing.
As shown in Figure 1, existing conventional design bandpass filter does not have amplitude equalizer, do not have signal behavior and amplitude tune
Whole function is unable to satisfy using with interior scheme as flat as possible while guarantee rectangular degree and filter pass through delay.
As in Figure 2-4, it is a kind of by time delay it is small determine band broadband-pass filter, including bandpass filter and connection band logical
The amplitude equalizer of filter；
Band pass filter circuit is connected in series in the equalizing circuit of the amplitude equalizer.
The amplitude equalizer includes equalizing circuit part a and equalizing circuit part b；
The equalizing circuit part a includes inductance L12, capacitor C10 and resistance R1；The inductance L12 and capacitor C10 are successively
It is connected on band pass filter circuit end；Inductance L12 and capacitor C10 forms series resonance, and resonance frequency is by equalizing circuit
Frequency of heart, it is then in parallel with resistance R1.
The equalizing circuit part b includes resistance R2, resistance R3, capacitor C11, inductance L13 and resistance R4；
The resistance R2 is in parallel with resistance R1 after connecting with resistance R3；The capacitor C11 is parallel to after connecting with inductance L13
On route between resistance R2 and resistance R3；The inductance L13 and capacitor C11 forms parallel resonance, and resonance frequency is balanced
The centre frequency of circuit, ground connection of then connecting with resistance R4.
After bandpass filter transmits signal access equalizing circuit, equalizing circuit part a and equalizing circuit part b are realized simultaneously
The function of signal behavior and amplitude adjustment.
Preferably, the resistance is 0603 type of Samsung；The capacitor is the triumphant regular senior middle school Q capacitor DLC10A series in Dalian Dary；
The inductance is U.S.'s line skill magnet ring wire-wound inductor.Bandpass filter is not fixed filters, the selection of model and balanced net
The component value of network part is related to equilibrium quantity with frequency, is not fixed and invariable value.
Embodiment one
The technical solution of bandpass filter and amplitude equalizer combination based on this practical proposition, designs and has made one
A 60MHz centre frequency, 9~11MHz of three dB bandwidth, the bandpass filter of squareness factor about 2.6, in 10MHz absolutely delay≤
130nS；The 60MHz centre frequency of existing conventional design, 9~11MHz of three dB bandwidth, the bandpass filtering of squareness factor about 2.6
Device, be absolutely delayed in 10MHz > 150 nS；The utility model guarantees rectangular degree and small in the case where limiting absolute bandwidth simultaneously
Filter delay, the delay of filter is opposite to reduce 15% or so.
Embodiment described above is only the preferred embodiment of the utility model, and the not feasible implementation of the utility model
Exhaustion.For persons skilled in the art, it is made under the premise of without departing substantially from the utility model principle and spirit
Any obvious change out, should all be contemplated as falling within the claims of the utility model.
Claims (3)
1. it is a kind of by time delay it is small determine band broadband-pass filter, it is characterised in that: including bandpass filter and connection band logical filter
The amplitude equalizer of wave device；
Band pass filter circuit is connected in series in the equalizing circuit of the amplitude equalizer；
The amplitude equalizer includes equalizing circuit part a and equalizing circuit part b；
The equalizing circuit part a includes inductance L12, capacitor C10 and resistance R1；The inductance L12 and capacitor C10 are sequentially connected in series
At band pass filter circuit end；Inductance L12 and capacitor C10 forms series resonance, and resonance frequency is by the center frequency of equalizing circuit
Rate, it is then in parallel with resistance R1.
2. it is according to claim 1 it is a kind of by time delay it is small determine band broadband-pass filter, it is characterised in that: the equilibrium
Circuit part b includes resistance R2, resistance R3, capacitor C11, inductance L13 and resistance R4；
The resistance R2 is in parallel with resistance R1 after connecting with resistance R3；The capacitor C11 is parallel to resistance after connecting with inductance L13
On route between R2 and resistance R3；The inductance L13 and capacitor C11 forms parallel resonance, and resonance frequency is by equalizing circuit
Centre frequency, ground connection of then connecting with resistance R4.
3. it is according to claim 2 it is a kind of by time delay it is small determine band broadband-pass filter, it is characterised in that: the resistance
For 0603 type of Samsung；The capacitor is the triumphant regular senior middle school Q capacitor DLC10A series in Dalian Dary；The inductance be U.S.'s line skill magnet ring around
Line inductance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920110685.3U CN209517075U (en) | 2019-01-23 | 2019-01-23 | It is a kind of by time delay it is small determine band broadband-pass filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920110685.3U CN209517075U (en) | 2019-01-23 | 2019-01-23 | It is a kind of by time delay it is small determine band broadband-pass filter |
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| CN209517075U true CN209517075U (en) | 2019-10-18 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111884621A (en) * | 2020-07-24 | 2020-11-03 | 北京航天新风机械设备有限责任公司 | Chip-scale micro-packaged band-pass filter and packaging method thereof |
| CN114584095A (en) * | 2022-05-06 | 2022-06-03 | 青岛鼎信通讯股份有限公司 | Amplitude equalization filter circuit based on narrowband carrier frequency modulation |
| CN117176100A (en) * | 2023-11-03 | 2023-12-05 | 苏州博海创业微系统有限公司 | Band-pass filter circuit and filter for improving in-band flatness |
| CN117335766A (en) * | 2023-12-01 | 2024-01-02 | 成都世源频控技术股份有限公司 | Ultra-wideband radio frequency equalizer structure |
-
2019
- 2019-01-23 CN CN201920110685.3U patent/CN209517075U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111884621A (en) * | 2020-07-24 | 2020-11-03 | 北京航天新风机械设备有限责任公司 | Chip-scale micro-packaged band-pass filter and packaging method thereof |
| CN111884621B (en) * | 2020-07-24 | 2021-10-08 | 北京新风航天装备有限公司 | Chip-scale micro-packaged band-pass filter and packaging method thereof |
| CN114584095A (en) * | 2022-05-06 | 2022-06-03 | 青岛鼎信通讯股份有限公司 | Amplitude equalization filter circuit based on narrowband carrier frequency modulation |
| CN117176100A (en) * | 2023-11-03 | 2023-12-05 | 苏州博海创业微系统有限公司 | Band-pass filter circuit and filter for improving in-band flatness |
| CN117176100B (en) * | 2023-11-03 | 2024-02-23 | 苏州博海创业微系统有限公司 | Band-pass filter circuit and filter for improving in-band flatness |
| CN117335766A (en) * | 2023-12-01 | 2024-01-02 | 成都世源频控技术股份有限公司 | Ultra-wideband radio frequency equalizer structure |
| CN117335766B (en) * | 2023-12-01 | 2024-03-26 | 成都世源频控技术股份有限公司 | Ultra-wideband radio frequency equalizer structure |
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