CN107425245B - A kind of restructural multi-mode filter of novel micro-strip - Google Patents
A kind of restructural multi-mode filter of novel micro-strip Download PDFInfo
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- CN107425245B CN107425245B CN201710455657.0A CN201710455657A CN107425245B CN 107425245 B CN107425245 B CN 107425245B CN 201710455657 A CN201710455657 A CN 201710455657A CN 107425245 B CN107425245 B CN 107425245B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/203—Strip line filters
- H01P1/20327—Electromagnetic interstage coupling
- H01P1/20354—Non-comb or non-interdigital filters
- H01P1/20381—Special shape resonators
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Abstract
The invention discloses a kind of novel restructural multi-mode filters of micro-strip, when DC offset voltage adds forward voltage, diode current flow at this time is connected between transmission line 11 and transmission line 13 and between transmission line 12 and transmission line 13, and filter passband centre frequency is in high frequency treatment；When DC offset voltage adds backward voltage, diode ends at this time, between transmission line 11 and transmission line 13 and transmission line 12 and transmission line 13 it is separated, filter passband centre frequency is at low frequency.The present invention realizes the switching of band connection frequency by the on-off of PIN diode, and structure is simple.
Description
Technical field
The invention belongs to millimeter waves and microwave device technology field, and in particular to a kind of novel restructural multimode filtering of micro-strip
Device.
Background technique
Into after 21 century, wireless communication technique has development at full speed, and wireless telecom equipment is also seen everywhere.4G
(FDD-LTE, TDD-LTE) is popularized comprehensively, in order to meet growing connection requirement, and along with virtual existing
The development of the technologies such as real, augmented reality and Internet of Things cloud computing, people have started the research and development of 5G again.Future proposes wireless device
A series of new demands such as lower price, lighter weight, bigger capacity.Filter is that wireless telecom equipment is indispensable
A part, there is frequency selective characteristic, useful signal can be filtered out, and inhibit to unwanted signal, radar,
It is widely used in many electronic equipments such as mobile communication.The superiority and inferiority of its performance has important shadow to the performance of entire communication equipment
It rings.
Multiple communications bands are had in the same communication system, in order to realize that the function, the use multiple groups of comparative maturity are received
Hair technology, but this technology is very big to the investment of device.Single filter can be used using restructural multi-mode filter technology,
To realize multiple frequency characteristics.By the way that adjustable element is added in filter, so that it may realize to passband central frequency, bandwidth and
The adjusting of the parameters such as Out-of-band rejection.
Summary of the invention
It is an object of the invention to overcome deficiency in the prior art, a kind of restructural multimode filtering of novel micro-strip is provided
Device, the PIN diode which uses realize the switching of band connection frequency, and the filter of design has size small, and structure is simple
The advantages that.
In order to solve the above technical problems, the present invention provides a kind of novel restructural multi-mode filter of micro-strip, including medium
Substrate is equipped with metal floor in the bottom surface of medium substrate, is etched with microwave circuit in the upper surface of medium substrate, characterized in that
Microwave circuit includes sequentially connected first feeding network, multimode toroidal cavity resonator and the second feeding network, the first feeding network,
Multimode toroidal cavity resonator and the second feeding network constitute using at the vertical center of multimode toroidal cavity resonator as pair of symmetrical center line
Claim structure；
Wherein the first feeding network is made of transmission line four, and the second feeding network is made of transmission line five, transmission line four with
Transmission line five is two fingers structure and is symmetrical arranged；The left port of transmission line four is as input port, the right output port of transmission line five
As output port；
Multimode toroidal cavity resonator includes transmission line six, transmission line seven, transmission line eight, transmission line nine, transmission line ten, transmission line
11, transmission line 12, transmission line 13 and PIN diode, transmission line nine, transmission line eight and transmission line ten are sequentially connected structure
At the right angle ∪ shape of opening upwards, the left and right sides difference horizontal connection transmission line six and transmission line seven of transmission line eight, transmission line
Six are located between the two fingers of transmission line four, and transmission line seven is located between the two fingers of transmission line five, and nine one end of transmission line vertically connects
Transmission line 11, ten one end of transmission line vertically connects transmission line 12, and transmission line 11 and transmission line 12 are relative orientation,
Being horizontally disposed with positioned at the middle position of transmission line 11 and transmission line 12 has transmission line 13, transmission line 11 and transmission line ten
It has connected between three and between transmission line 12 and transmission line 13 diode, has been grounded after 13 series inductance of transmission line；Two
The both ends of pole pipe provide DC offset voltage by Bias circuit.
The course of work of filter of the present invention are as follows: when DC offset voltage adds forward voltage, diode current flow at this time,
It is connected between transmission line 11 and transmission line 13 and between transmission line 12 and transmission line 13, filter passband center frequency
Rate is in high frequency treatment；
When DC offset voltage adds backward voltage, diode ends at this time, transmission line 11 and transmission line 13 it
Between and transmission line 12 and transmission line 13 it is separated, filter passband centre frequency is at low frequency.Pass through PIN diode
On-off realize band connection frequency switching.
Further, transmission line four is identical as five the two size of transmission line.
Further, of same size, transmission line seven and the transmission line of transmission line six and gap above and below the two fingers of transmission line four
Gap is of same size above and below five two fingers.
Further, the symmetrical centre of the filter is overlapped with the vertical center of transmission line 13 and transmission line eight.
Further, Bias circuit includes that resistance R, capacitor C and inductance L, DC supply input are directly connected to electricity all the way
It is grounded after holding C, the anode of diode is connected after another way series resistance R and inductance L.
Further, medium substrate with a thickness of 0.508mm, dielectric constant 3.38, loss angle tangent 0.0027.
Compared with prior art, the beneficial effects obtained by the present invention are as follows being: the PIN diode that the filter uses is realized logical
Switching with frequency, this filter construction are simple.
Detailed description of the invention
Fig. 1 is the side view of the restructural multi-mode filter of micro-strip；
Fig. 2 is the structural schematic diagram of the restructural multi-mode filter of micro-strip；
When Fig. 3 is that the restructural multi-mode filter PIN diode of micro-strip is connected, frequency range emulates and actual measurement S ginseng in 1-6GHz
Number schematic diagram；
When Fig. 4 is that the restructural multi-mode filter PIN diode of micro-strip ends, frequency range emulates and actual measurement S ginseng in 1-6GHz
Number schematic diagram.
Appended drawing reference: 1, microwave circuit；2, medium substrate；3, metal floor；4, transmission line four；5, transmission line five；6, it passes
Defeated line six；7, transmission line seven；8, transmission line eight；9, transmission line nine；10, transmission line ten；11, transmission line 11；12, transmission line ten
Two；13, transmission line 13.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following embodiment is only used for clearly illustrating the present invention
Technical solution, and not intended to limit the protection scope of the present invention.
A kind of novel restructural filtering of micro-strip of the invention, as shown in Figure 1, including medium substrate 2, medium substrate 2 is used
The substrate of double-sided copper-clad in the prior art, with a thickness of 0.508mm, dielectric constant 3.38, loss angle tangent 0.0027.In
The bottom surface of medium substrate 2 is equipped with metal floor 3, is etched with microwave circuit 1 in the upper surface of medium substrate 2, microwave circuit 1 includes
Sequentially connected first feeding network, multimode toroidal cavity resonator and the second feeding network, the first feeding network, multimode annular resonance
Device and the second feeding network constitute using at the vertical center of multimode toroidal cavity resonator as the symmetrical structure of symmetrical center line.
As shown in Fig. 2, wherein the first feeding network is made of transmission line 44, the second feeding network is by 55 structure of transmission line
At transmission line 44 and transmission line 55 are two fingers structure, and the two size is identical, and are symmetrical arranged.By taking transmission line 44 as an example,
The two fingers structure feeding network overall length is L1, the two fingers of microstrip line and right side comprising left side, left side micro belt line width is W1, right
The dimensional parameters of side two fingers are identical, length L2, width W2.The left port of transmission line 44 is as input port Port1, transmission
The right output port of line 55 is as output port Port2.
Multimode toroidal cavity resonator is by transmission line 66, transmission line 77, transmission line 88, transmission line 99, transmission line 10, biography
Defeated line 11, transmission line 12, transmission line 13 and PIN diode composition.Transmission line 99, transmission line 88 and biography
Defeated line 10 is sequentially connected the right angle ∪ shape for constituting opening upwards, and horizontal connection transmission line is distinguished in the left and right sides of transmission line 88
66 and transmission line 77, transmission line 66 be located between the two fingers of transmission line 44, transmission line 77 is located at the two fingers of transmission line 55
Between, vertical connection transmission line 11 is continued in 99 one end of transmission line, and 10 one end of transmission line vertically connects transmission line 12
12, and transmission line 11 and transmission line 12 are relative orientation, in transmission line 11 and transmission line 12
Between position is horizontally disposed transmission line 13, connected SMP1345-079 between transmission line 11 and transmission line 13
Type PIN diode, SMP1345-079 type PIN diode of also having connected between transmission line 12 and transmission line 13, transmission
It is grounded after 13 series inductance L of line.
The multimode goes in ring resonator as symmetrical structure, and symmetry axis is dotted line in Fig. 2, which passes through 13 He of transmission line
The center of transmission line 88.The dimensional parameters of each microstrip line are specifically as shown in table 1 in resonator.Transmission line 77 is inserted into transmission line
Between 55 two fingers, transmission line 66 is inserted between the two fingers of transmission line 44, with upper and lower two fingers there are the gap of same widths,
Gap makes the two fingers of transmission line 66 (or transmission line 7) and transmission line 44 (or transmission line 5 5) generate coupling.
Table 1: the design parameter of every section of transmission line of resonator
| L1 | L2 | L3 | L4 | L5 | L6 | L7 |
| 12mm | 9.5mm | 10mm | 9.5mm | 7.23mm | 2.3mm | 3.0mm |
| W1 | W2 | W3 | W4 | W5 | W6 | |
| 1.16mm | 0.28mm | 0.30mm | 0.80mm | 0.80mm | 0.80mm |
The both ends of PIN diode provide DC offset voltage by Bias circuit, and Bias circuit includes resistance R, capacitor C and electricity
Feel L, DC supply input is grounded after being directly connected to capacitor C all the way, connects diode after another way series resistance R and inductance L
Anode.Inductance L in Bias circuit is 50nH, and series inductance can prevent radiofrequency signal to be crosstalked into DC power supply.Resistance R is
221 Ω, resistance provide suitable operating current for controlling size of current, for diode, and capacitor C is 10pF, and capacitor can be filtered
Except the clutter in power supply.
The course of work of filter of the invention are as follows:
When filter DC offset voltage is plus forward voltage (as+3V), diode current flow at this time, transmission line 11
It is connected between transmission line 13 and between transmission line 12 and transmission line 13, filter passband centre frequency exists
High frequency treatment.
When filter DC offset voltage is plus backward voltage (such as -3V), diode ends at this time, transmission line 11
Between transmission line 13 and transmission line 12 and transmission line 13 it is separated, filter passband centre frequency exists
At low frequency.
The filter realizes the switching of band connection frequency by controlling conducting and the cut-off of diode, this filter has knot
The simple advantage of structure.
The frequency response characteristic of filter include transmission characteristic i.e. | S21 | amplitude response, reflection characteristic be | S11 | amplitude is rung
It answers.Fig. 3 is the emulation and actual measurement S parameter when DC offset voltage adds+3V, and diode current flow, actual measurement show filter at this time
3dB passband be frequency be 3.15-4.64GHz, the Insertion Loss at centre frequency is 1dB.Filter passband centre frequency is in high frequency
Place.Fig. 4 is the emulation and actual measurement S parameter when DC offset voltage adds -3V, and diode ends at this time, and actual measurement shows filter
3dB passband is that frequency is 2.4-2.9GHz, and the Insertion Loss at centre frequency is 2.1dB.Filter passband centre frequency is in low frequency
Place.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvements and modifications, these improvements and modifications can also be made
Also it should be regarded as protection scope of the present invention.
Claims (5)
1. a kind of restructural multi-mode filter of novel micro-strip, including medium substrate are equipped with metal floor in the bottom surface of medium substrate,
Be etched with microwave circuit in the upper surface of medium substrate, characterized in that microwave circuit include sequentially connected first feeding network,
Multimode toroidal cavity resonator and the second feeding network, the first feeding network, multimode toroidal cavity resonator and the second feeding network constitute with
It is the symmetrical structure of symmetrical center line at the vertical center of multimode toroidal cavity resonator；
Wherein the first feeding network is made of transmission line four, and the second feeding network is made of transmission line five, transmission line four and transmission
Line five is two fingers structure and is symmetrical arranged；The left port of transmission line four is as input port, the right output port conduct of transmission line five
Output port；
Multimode toroidal cavity resonator includes transmission line six, transmission line seven, transmission line eight, transmission line nine, transmission line ten, transmission line ten
One, transmission line 12, transmission line 13 and PIN diode, transmission line nine, transmission line eight and transmission line ten are sequentially connected composition
The right angle ∪ shape of opening upwards, the left and right sides difference horizontal connection transmission line six and transmission line seven of transmission line eight, transmission line six
Between the two fingers of transmission line four, transmission line seven is located between the two fingers of transmission line five, and nine one end of transmission line vertically connects biography
Defeated line 11, ten one end of transmission line vertically connects transmission line 12, and transmission line 11 and transmission line 12 are relative orientation, position
Being horizontally disposed in the middle position of transmission line 11 and transmission line 12 has transmission line 13, transmission line 11 and transmission line 13
Between and transmission line 12 and transmission line 13 between connected diode, be grounded after 13 series inductance of transmission line；Two poles
The both ends of pipe provide DC offset voltage by Bias circuit；
Bias circuit includes resistance R, capacitor C and inductance L, and DC supply input is grounded after being directly connected to capacitor C all the way, another
The anode of diode is connected after road series resistance R and inductance L.
2. a kind of novel restructural multi-mode filter of micro-strip according to claim 1, characterized in that transmission line four and transmission
Both lines five size is identical.
3. a kind of novel restructural multi-mode filter of micro-strip according to claim 1, characterized in that transmission line six and transmission
Gap is of same size above and below the two fingers of line four, and transmission line seven is of same size with the upper and lower gap of two fingers of transmission line five.
4. a kind of novel restructural multi-mode filter of micro-strip according to claim 1, characterized in that pair of the filter
Title center is overlapped with the vertical center of transmission line 13 and transmission line eight.
5. a kind of novel restructural multi-mode filter of micro-strip according to claim 1, characterized in that the thickness of medium substrate
For 0.508mm, dielectric constant 3.38, loss angle tangent 0.0027.
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| CN201710455657.0A CN107425245B (en) | 2017-06-16 | 2017-06-16 | A kind of restructural multi-mode filter of novel micro-strip |
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| CN201710455657.0A CN107425245B (en) | 2017-06-16 | 2017-06-16 | A kind of restructural multi-mode filter of novel micro-strip |
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| CN107425245A CN107425245A (en) | 2017-12-01 |
| CN107425245B true CN107425245B (en) | 2019-11-22 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109150129A (en) * | 2018-07-24 | 2019-01-04 | 电子科技大学 | A kind of band logical/band resistance frequency response reconfigurable filter |
| CN113013566B (en) * | 2021-03-21 | 2022-01-28 | 南通大学 | Switchable microstrip double balun |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090053977A (en) * | 2007-11-26 | 2009-05-29 | 한양대학교 산학협력단 | Tunable filter |
| CN103117426A (en) * | 2013-01-28 | 2013-05-22 | 南京理工大学 | Radio frequency reconfigurable band-pass filter with wide bandwidth adjusting range and controllable performance |
| CN104733813A (en) * | 2015-03-16 | 2015-06-24 | 华南理工大学 | Broadband bandpass filter with frequency and bandwidth reconfigurable |
| CN105304985A (en) * | 2015-11-27 | 2016-02-03 | 南京信息工程大学 | Broadband band-pass filter based on seven-mode resonator |
| CN206961987U (en) * | 2017-06-16 | 2018-02-02 | 南京信息工程大学 | A kind of new micro-strip restructural multi-mode filter |
-
2017
- 2017-06-16 CN CN201710455657.0A patent/CN107425245B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090053977A (en) * | 2007-11-26 | 2009-05-29 | 한양대학교 산학협력단 | Tunable filter |
| CN103117426A (en) * | 2013-01-28 | 2013-05-22 | 南京理工大学 | Radio frequency reconfigurable band-pass filter with wide bandwidth adjusting range and controllable performance |
| CN104733813A (en) * | 2015-03-16 | 2015-06-24 | 华南理工大学 | Broadband bandpass filter with frequency and bandwidth reconfigurable |
| CN105304985A (en) * | 2015-11-27 | 2016-02-03 | 南京信息工程大学 | Broadband band-pass filter based on seven-mode resonator |
| CN206961987U (en) * | 2017-06-16 | 2018-02-02 | 南京信息工程大学 | A kind of new micro-strip restructural multi-mode filter |
Non-Patent Citations (2)
| Title |
|---|
| "miniaturized reconfigurable and switchable filter from UWB to 2.4 GHz WLAN using PIN diodes";M.F.Karim et al;《2009 IEEE MTT-S International Microwave Symposium digest》;20090612;全文 * |
| "频率可重构双通带带通滤波器的设计";李涛等;《2015年第十届全国毫米波、亚毫米波学术会议》;20151030;第6-9页 * |
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