CN202308241U - High-pass filter with transmission zero - Google Patents
High-pass filter with transmission zero Download PDFInfo
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- CN202308241U CN202308241U CN 201120422712 CN201120422712U CN202308241U CN 202308241 U CN202308241 U CN 202308241U CN 201120422712 CN201120422712 CN 201120422712 CN 201120422712 U CN201120422712 U CN 201120422712U CN 202308241 U CN202308241 U CN 202308241U
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- pass filter
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Abstract
The utility model discloses a high-pass filter with a transmission zero, which comprises a cavity and a cover plate covered on the cavity. Two rows of capacitor plates which are arranged at intervals are parallelly distributed in the cavity, a series connection coupling capacitor is formed by the two rows of capacitor plates, each row of capacitor plates is composed of a plurality of capacitor plates arranged in the same plane, and the two rows of capacitor plates are arranged in staggered mode. Each capacitor plate in one row corresponds to two capacitor plates in the other row, the positions of interval gaps of each row of capacitor plates are connected with parallel branch knots, and a tuning screw is installed on the cover plate above connecting positions of the parallel branch knots and the capacitor plates. Compared with a traditional distributed high-pass filter, the transmission zero is added, an out-of-band rejection characteristic is enhanced, the filter is small in volume, and operating frequency can be extended to 6-10 times of the lowest frequency.
Description
Technical field
The utility model relates to the electronic devices and components in the communications field, is specifically related to a kind of high pass filter with transmission zero.
Background technology
High pass filter is usually used in low frequency signal is suppressed, and with the distribution of measuring-signal high order harmonic component, also is used at a distance from straight the protection instrument sometimes.High pass filter also can be connected with low pass filter and formed broadband filter, or parallel connection formation broadband mixer, has wide application scenarios.Traditional high pass filter is a distributed frame, and volume is bigger, and higher mode is nearer from basic mode; Bandwidth is not wide; The highest frequency of general passband is merely 2～3 times of low-limit frequency, and can not produce transmission zero, can't tackle the occasion that bandwidth requirement broad or inhibition are had relatively high expectations.
Summary of the invention
The purpose of the utility model is in order to overcome the deficiency of prior art, a kind of high pass filter with transmission zero to be provided, to satisfy the requirement that bandwidth requirement broad or inhibition are had relatively high expectations.
For realizing above-mentioned purpose; The high pass filter of the band transmission zero of the utility model design comprises cavity, covers the cover plate above cavity, the capacitor plate that two rows that are arranged in parallel in the said cavity are provided with at interval; Two row's capacitor plates are formed series coupled electric capacity; Wherein every row's capacitor plate is made up of a plurality of capacitor plates in same planar alignment, and two row's capacitor plates are staggered, and each the piece capacitor plate among the row is corresponding with two pole plates during other arranges; Each row's capacitor plate gap location at interval is connected with parallelly connected minor matters, on the cover plate of the top of the junction of parallelly connected minor matters and capacitor plate tuning screw is installed.
In technique scheme, be provided with the ceramic dielectric substrate between described two row's capacitor plates.
In technique scheme, said parallelly connected minor matters are made up of a perceptual transmission line of joint and a joint capacitive transmission line cascade.
The utility model is compared with traditional distributed high pass filter, replaces the short circuit minor matters of former filter with the parallel resonance minor matters, increases transmission zero, the outer suppression characteristic of reinforcing band; Replace stereochemical structure with planar structure, reduce the filter volume; Increase the debugging screw rod, be convenient to debugging.Because volume ratio tradition high pass filter volume is little, the higher order resonances frequency is high, makes 6-10 that the frequency of utilization of this utility model can extend to low-limit frequency doubly.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment;
Among the figure: 1, cavity, 2, cover plate, 3, tuning screw, 4, series coupled electric capacity, 5, the parallel resonance minor matters, 6, dielectric substrate, 7, input and output connector.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is done further to describe in detail:
The high pass filter of band transmission zero as shown in Figure 1; Comprise cavity 1, cover the cover plate 2 above cavity 1; Capacitor plate 4, two row's capacitor plates 4 that two rows that are arranged in parallel in the cavity 1 are provided with are at interval formed series coupled electric capacity, and wherein every row's capacitor plate is made up of a plurality of capacitor plates in same planar alignment; Two row's capacitor plates are staggered; Two pole plates are corresponding among each piece capacitor plate among one row and the other row, and each row's capacitor plate gap location at interval is connected with parallelly connected minor matters 5, on the cover plate of the top of the junction of parallelly connected minor matters 5 and capacitor plate tuning screw 3 is installed.Between two row's capacitor plates 4 ceramic dielectric substrate 6 is set, as dielectric substrate, certainly, also dielectric substrate can be set, directly separate into the space, air is as dielectric substrate.Series coupled electric capacity 4, parallel resonance minor matters 5 are made up of the metallic layer circuit of dielectric substrate 6 upper and lower surfaces, and series coupled electric capacity 4 distributes alternately with parallel resonance minor matters 5, and are provided with tuning screw 3 above the joint, and dielectric substrate 6 is installed in the cavity 1.
Input and output connector 7 is installed in the two ends of cavity 1.The parallel connection minor matters are made up of a perceptual transmission line of joint and a joint capacitive transmission line cascade, and perhaps parallel resonance minor matters 5 are made up of more than or equal to the transmission line cascade that transmission line and the impedance of 100 Ω is less than or equal to 50 Ω impedance.
Its operation principle is the operation principle of elliptic function high pass filter.The metal level that is positioned at dielectric substrate 6 upper and lower surfaces constitutes series coupled electric capacity 4, and the high-impedance transmission line and the cascade of Low ESR transmission line that are positioned at dielectric substrate 6 one sides constitute parallel resonance minor matters 5, and these minor matters determine the outer transmission of the band frequency location at zero point.After forming transmission zero, can strengthen the suppression characteristic of low pass filter.Because the structure used is lumped parameter design in the design, specific volume is littler mutually with the element of distributed constant, thereby higher mode is farther, the pass band width broad.
Obviously, those skilled in the art can carry out various changes and modification to the utility model and not break away from the spirit and the scope of the utility model.Like this, belong within the scope of the utility model claim and equivalent technologies thereof if these of the utility model are revised with modification, then the utility model also is intended to comprise these changes and modification interior.
The content of not doing in this specification to describe in detail belongs to this area professional and technical personnel's known prior art.
Claims (3)
1. high pass filter with transmission zero; It is characterized in that: comprise cavity (1), cover the cover plate (2) above cavity; The capacitor plate (4) that two rows that are arranged in parallel in the said cavity (1) are provided with at interval, two row's capacitor plates (4) are formed series coupled electric capacity, and wherein every row's capacitor plate is made up of a plurality of capacitor plates in same planar alignment; Two row's capacitor plates are staggered; Two pole plates are corresponding among each piece capacitor plate among one row and the other row, and each row's capacitor plate gap location at interval is connected with parallelly connected minor matters (5), on the cover plate of the top of the junction of parallelly connected minor matters (5) and capacitor plate tuning screw (3) is installed.
2. the high pass filter of band transmission zero according to claim 1 is characterized in that: be provided with ceramic dielectric substrate (6) between described two row's capacitor plates (4).
3. the high pass filter of band transmission zero according to claim 1 is characterized in that: said parallelly connected minor matters (5) are made up of a perceptual transmission line of joint and a joint capacitive transmission line cascade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120422712 CN202308241U (en) | 2011-10-31 | 2011-10-31 | High-pass filter with transmission zero |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120422712 CN202308241U (en) | 2011-10-31 | 2011-10-31 | High-pass filter with transmission zero |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202308241U true CN202308241U (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120422712 Expired - Lifetime CN202308241U (en) | 2011-10-31 | 2011-10-31 | High-pass filter with transmission zero |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202308241U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103888101A (en) * | 2014-04-04 | 2014-06-25 | 武汉凡谷电子技术股份有限公司 | Filter ripple wave and group delay fluctuation compensation method |
| CN107403984A (en) * | 2017-07-14 | 2017-11-28 | 成都九洲迪飞科技有限责任公司 | Suspend the high suppression high-pass filter of micro-strip |
| CN110867633A (en) * | 2019-10-30 | 2020-03-06 | 苏州灿勤通讯技术有限公司 | Novel filter |
-
2011
- 2011-10-31 CN CN 201120422712 patent/CN202308241U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103888101A (en) * | 2014-04-04 | 2014-06-25 | 武汉凡谷电子技术股份有限公司 | Filter ripple wave and group delay fluctuation compensation method |
| CN107403984A (en) * | 2017-07-14 | 2017-11-28 | 成都九洲迪飞科技有限责任公司 | Suspend the high suppression high-pass filter of micro-strip |
| CN110867633A (en) * | 2019-10-30 | 2020-03-06 | 苏州灿勤通讯技术有限公司 | Novel filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120704 |