CN203839492U - Broadband drop-in type microstrip ferrite isolator - Google Patents
Broadband drop-in type microstrip ferrite isolator Download PDFInfo
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- CN203839492U CN203839492U CN201420008931.1U CN201420008931U CN203839492U CN 203839492 U CN203839492 U CN 203839492U CN 201420008931 U CN201420008931 U CN 201420008931U CN 203839492 U CN203839492 U CN 203839492U
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- Prior art keywords
- ferrite
- isolator
- broadband
- falls
- declines
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Abstract
The utility model discloses a broadband drop-in type microstrip ferrite isolator. The broadband drop-in type microstrip ferrite isolator is formed on the basis of a drop-in type microstrip junction type isolator in a way to have three ferrite arms extend out from a ferrite sample and further make small Y type open-circuit microstrip lines cover the ferrite arms. The small Y type open-circuit lines are actually used as three open-circuit lines for offsetting reactance of the impedance part on the port of a central junction and further making only resistance parts left among the equivalent impedance of the central junction. Coupling within a broadband range is facilitated. The working bandwidth of an integratable drop-in type isolator can be widened.
Description
Technical field
The utility model belongs to radio circuit communication technical field, relates to a kind of broadband and falls into the band ferrite isolator that declines.
Background technology
Microwave ferrite isolator is a kind of passive device with microwave unidirectional transmission property, in various passive, active microwave circuits modules, extension set, complete machine, is applied, and plays inter-stage isolation, prevents from harassing, the effect such as impedance matching, decoupling.As: the noise that adds microwave ferrite isolator and can reduce module at amplifier chain module front end; Add microwave ferrite isolator at power amplifier end and prevent that module from burning; In power splitter, coupler circuit, add microwave ferrite isolator and play decoupling effect, can harass etc. by anti-stop signal.In the last few years, along with the development of microwave&millimeter-wave IC, the requirement of ferrite device was turned to gradually and was easy to the miniaturization that is connected with integrated circuit, integrated, broadband direction.Ferrite circulator or the isolator that at present, can meet integrated requirement have several version below: full-magnetic, inserted, full-magnetic, eclipsed form and fall into formula (Drop in).First three plants the device of version, and centre junction is by very thin ferrite sample composition, so the demagnetizing factor in short transverse is very large, also just higher to the requirement of additional permanent bias field, this has brought very large difficulty with regard to the design of giving external magnetic circuit.And the version that falls into formula just in time can solve this difficulty, it,, by increasing the height of centre junction, greatly reduces required additional permanent bias field, and therefore this version is specially adapted to develop the integrated ferrite circulator of millimeter wave or isolator.But the routine of report falls into the performance of formula circulator bad in the early time, and its frequency band is not wide, and isolation is also lower, still has a lot of problems.
Utility model content
The utility model, for the deficiencies in the prior art, has proposed a kind of broadband and has fallen into the band ferrite isolator that declines.
A kind of broadband of the utility model falls into the band ferrite isolator that declines, and comprises the microstrip line on microwave circuit medium substrate, permanent magnet, insulating barrier, absorbing load, ferrite sample and ferrite.
Described ferrite sample is made up of integrated centre junction, three ferrite arms and three ferrite slopes; Cylindrical structural is become at described center; Three ferrite arms are rectangular structure, are evenly distributed on centre junction outside and pass through mutually with the columniform lateral surface of centre junction, are little " Y " type structure; Three ferrite slopes are a triangular prism structure of laterally placing, and are evenly distributed on respectively between three ferrite arms, and pass through mutually with the columniform lateral surface of centre junction, are large " Y " type structure.With the structure of two " Y " types, be referred to as " two Y knot " wherein in large " Y " type structure the long and wide upper surface that is greater than respectively little " Y " type structural iron oxysome arm of upper surface on ferrite slope grow and wide;
Ferrite sample is bonded on microwave circuit medium substrate; Insulating barrier and permanent magnet on then bonding successively at the back side of microwave circuit medium substrate, the radius of insulating barrier and permanent magnet is identical with centre junction radius, then be covered with microstrip line at ferrite sample upper surface, absorbing load is attached on the end microstrip line of one of them ferrite on tiltedly.
Described ferrite specimen material is YIG gyromagnetic material;
The gradient on described ferrite slope is 30 °;
Described absorbing load is film absorption load;
Described insulating layer material is polytetrafluoroethylene;
Described microstrip line material is copper.
" two Y knot " structure applications is being fallen into formula microstrip isolator by the utility model, and utility model point of the present utility model is to improve falling into the band spacer structures that declines.
Beneficial effect: the utility model adds little " Y " type open-circuit line outward at centre junction, offset centre junction reaction component, only leave active component, recycle large " Y " type microstrip line and carry out impedance transformation, microstrip isolator part can be operated in the microwave radio integrated circuit of wider working frequency range.
Brief description of the drawings
Centered by Fig. 1, knot adds the equivalent circuit diagram of Y type open-circuit line;
Fig. 2 is the vertical view of isolator;
Fig. 3 is the plan view of isolator;
Fig. 4 is the three-dimensional structure diagram of isolator.
Embodiment
As shown in Figure 2, Figure 3, Figure 4: a kind of broadband of the utility model falls into the band ferrite isolator that declines, and comprises the microstrip line on microwave circuit medium substrate, permanent magnet, insulating barrier, absorbing load, ferrite sample and ferrite.
First fire ferrite sample, ferrite sample is become by integrated centre junction, three ferrite arms and three ferrite slopes; Cylindrical structural is become at described center, and three ferrite arms are evenly distributed on centre junction outside, and three ferrite slopes are evenly distributed on respectively between three ferrite arms.
Ferrite sample is bonded on microwave circuit medium substrate; Insulating barrier and permanent magnet on then bonding successively at the back side of microwave circuit medium substrate, the radius of insulating barrier and permanent magnet need be identical with centre junction radius, then be covered with microstrip line at ferrite sample upper surface, microstrip line on ferrite arm is the open-circuit line being connected in parallel on centre junction, microstrip line on ferrite slope is used for mating centre junction impedance and external circuit input and output impedance, and absorbing load is attached to the 3rd end ferrite slope end.
Described Ferrite Material is YIG gyromagnetic material;
The gradient on described ferrite sample slope is 30 °;
Described absorbing load is film absorption load;
Described insulating layer material is polytetrafluoroethylene;
Described microstrip line material is copper.
Centered by isolator groundwork region, knot is divided, and in centre junction region, by adjusting size and the thickness of centre junction, makes ferrite produce nonreciprocal effect under the effect in additional permanent magnetic field, i.e. annular effect, the first annular condition of Here it is circulator; Centre junction is equivalent to a resonator, its equiva lent impedance conventionally not with external interface impedance matching, three section of 4/ λ wavelength microstrip line that common use angle is the one-tenth " Y type " of 120 ° matches centre junction equiva lent impedance on the 50 Ω microstrip lines that are attached thereto, this method can effectively improve the performance of isolator and expand bandwidth, be called as the additional anti-technology of knot, this is also the second annular condition that circulator can be worked.Learnt by the second annular condition, if can adopt Broadband Matching technology that centre junction equiva lent impedance is mated with 50 ohm microstrip, just can realize broadband isolator.Though conventional Broadband Matching technology can effectively be expanded bandwidth but can cause size to increase as more piece 4/ λ wavelength or other length microstrip lines, and only relies on more piece impedance transformation cannot reach the bandwidth of frequency multiplication or even super frequency multiplication.
The method of design broadband isolator, except adopting the additional anti-technology of knot of more piece impedance transformation etc., has and in knot, adds anti-technology.The utility model is mainly applied to and falls into formula structure isolator adding anti-technology in knot.Two Y junction structures add anti-technology in conjunction with finishing in outer and knot, and bandwidth is further expanded.Three sections of impedance transformation line reverse side at large " Y type " knot add three open-circuit lines, and two Y knot microstrip circulators mainly adopt and in knot, add anti-technology, centre junction and little Y type open-circuit line equivalent parallel, equivalent circuit Fig. 1.The admittance of centre junction equivalent electric circuit is: G
j=G
r+ j ω C
1+ 1/j ω L
1, the equivalent admittance of little Y knot open-circuit line is G
y=j ω C
2+ 1/j ω L
2, the input admittance G of equivalence
1equal G
jwith G
ysum, that is: G
1=G
r+ j ω C
1+ 1/j ω L
1+ j ω C
2+ 1/j ω L
2=G
r+ j ω (C
1+ C
2-1/L
1-1/L
2), by regulating the size of open-circuit line, make j ω (C
1+ C
2-1/L
1-1/L
2) equal 0, three open-circuit lines balance out the reactance of port Impedance part, and the part of remaining resistance only in impedance, for outside coupling has been brought very large convenience.Proposed a kind of being applied in and fallen into the two Y knot designs that decline with junction circulator, the size of tying by adjusting size Y, adjusts centre junction size and thickness, in bandwidth, centre junction equiva lent impedance is matched on 50 Ω.This has supported to expand the method declining with junction circulator bandwidth that falls into theoretically.Little Y knot is in fact by three open-circuit lines, the reactance of centre junction port Impedance part to be balanced out, and makes in centre junction equiva lent impedance the only part of remaining resistance, is beneficial to coupling in broadband range.And the 1 and 2 port of large Y knot is connected respectively to input and output after adopting more piece impedance transformation, 3 ports connect absorbing load, the more piece impedance section of large Y knot is deposited on ferrite sample, and ferrite sample has higher dielectric constant (conventionally more than 13.5), the miniaturization that this also contributes to device, is beneficial to integrated.In this way, make isolator convenient integrated with radio circuit, obtain wider bandwidth simultaneously.
Claims (5)
1. broadband falls into the band ferrite isolator that declines, and comprises the microstrip line on microwave circuit medium substrate, permanent magnet, insulating barrier, absorbing load, ferrite sample and ferrite;
Described ferrite sample is made up of integrated centre junction, three ferrite arms and three ferrite slopes; Cylindrical structural is become at described center; Three ferrite arms are rectangular structure, are evenly distributed on centre junction outside and pass through mutually with the columniform lateral surface of centre junction, are little " Y " type structure; Three ferrite slopes are a triangular prism structure of laterally placing, and are evenly distributed on respectively between three ferrite arms, and pass through mutually with the columniform lateral surface of centre junction, are large " Y " type structure; With the structure of two " Y " types, be referred to as " two Y knot " wherein in large " Y " type structure the long and wide upper surface that is greater than respectively little " Y " type structural iron oxysome arm of upper surface on ferrite slope grow and wide;
Ferrite sample is bonded on microwave circuit medium substrate; Insulating barrier and permanent magnet on then bonding successively at the back side of microwave circuit medium substrate, the radius of insulating barrier and permanent magnet is identical with centre junction radius, then be covered with microstrip line at ferrite sample upper surface, absorbing load is attached on the end microstrip line of one of them ferrite on tiltedly.
2. broadband according to claim 1 falls into the band ferrite isolator that declines, and it is characterized in that: described ferrite specimen material is YIG gyromagnetic material.
3. broadband according to claim 1 falls into the band ferrite isolator that declines, and it is characterized in that: the gradient on described ferrite slope is 30 °.
4. broadband according to claim 1 falls into the band ferrite isolator that declines, and it is characterized in that: described absorbing load is film absorption load;
Broadband according to claim 1 falls into the band ferrite isolator that declines, and it is characterized in that: described insulating layer material is polytetrafluoroethylene.
5. broadband according to claim 1 falls into the band ferrite isolator that declines, and it is characterized in that: described microstrip line material is copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420008931.1U CN203839492U (en) | 2014-01-06 | 2014-01-06 | Broadband drop-in type microstrip ferrite isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420008931.1U CN203839492U (en) | 2014-01-06 | 2014-01-06 | Broadband drop-in type microstrip ferrite isolator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203839492U true CN203839492U (en) | 2014-09-17 |
Family
ID=51517293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420008931.1U Expired - Fee Related CN203839492U (en) | 2014-01-06 | 2014-01-06 | Broadband drop-in type microstrip ferrite isolator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203839492U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762406A (en) * | 2014-01-06 | 2014-04-30 | 杭州电子科技大学 | Broadband drop-in type microstrip ferrite isolator |
| CN104752798A (en) * | 2015-03-12 | 2015-07-01 | 西安电子科技大学 | Recyclable microwave circulator |
-
2014
- 2014-01-06 CN CN201420008931.1U patent/CN203839492U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762406A (en) * | 2014-01-06 | 2014-04-30 | 杭州电子科技大学 | Broadband drop-in type microstrip ferrite isolator |
| CN103762406B (en) * | 2014-01-06 | 2015-11-18 | 杭州电子科技大学 | A kind of broadband falls into the band ferrite isolator that declines |
| CN104752798A (en) * | 2015-03-12 | 2015-07-01 | 西安电子科技大学 | Recyclable microwave circulator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140917 Termination date: 20150106 |
|
| EXPY | Termination of patent right or utility model |