CN202997017U - High-frequency microstrip substrate-type isolator - Google Patents

High-frequency microstrip substrate-type isolator Download PDF

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Publication number
CN202997017U
CN202997017U CN 201220636392 CN201220636392U CN202997017U CN 202997017 U CN202997017 U CN 202997017U CN 201220636392 CN201220636392 CN 201220636392 CN 201220636392 U CN201220636392 U CN 201220636392U CN 202997017 U CN202997017 U CN 202997017U
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CN
China
Prior art keywords
substrate
microstrip
ferrospinel
permanent magnet
frequency
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 201220636392
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Chinese (zh)
Inventor
刘旷希
唐正龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Guangshun Electronic Technology Institute
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Nanjing Guangshun Electronic Technology Institute
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Priority to CN 201220636392 priority Critical patent/CN202997017U/en
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Publication of CN202997017U publication Critical patent/CN202997017U/en
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Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a high-frequency microstrip substrate-type isolator. The isolator comprises a seat, a spinel ferrite substrate having a saturation magnetic moment of 5000 Gs, a resistive film layer, a microstrip circuit and a permanent magnet, wherein the resistive film layer and the microstrip circuit are arranged on an upper surface of the spinel ferrite substrate, one pin of the microstrip circuit is connected with the resistive film layer, the permanent magnet is arranged on the microstrip circuit, the spinel ferrite substrate is fixed on the seat, and the thickness of the spinel ferrite substrate is 0.28-0.32 mm. The high-frequency microstrip substrate-type isolator provided by the utility model has the advantages of simple structure, small size, and light weight, being suitable for surface mounting and micro circuit integration, and having a large frequency range.

Description

A kind of high-frequency microstrip substrate formula isolator
Technical field
The utility model relates to a kind of isolator, relates in particular to a kind of high-frequency microstrip substrate formula isolator, belongs to the microwave communication field.
Background technology
Along with developing rapidly of microwave communication, the application of microwave electron equipment is increasingly extensive, overall performance also improves a lot, ferrite isolator index is wherein also had higher requirement, embedded isolator can not satisfy the demand of many systems paster substantially, and existing SMD isolator is lower due to operating frequency range, can not satisfy the needs of high-frequency range.
The utility model content
The utility model purpose: the purpose of this utility model is for the deficiencies in the prior art, and a kind of high-frequency microstrip substrate formula isolator is provided, and it is simple in structure, is applicable to surface mount and microcircuit is integrated, and satisfies the job requirement of lower frequency range.
Technical scheme: a kind of high-frequency microstrip substrate formula isolator described in the utility model, comprise that base, saturation magnetic moment are ferrospinel substrate, resistive layer, microstrip circuit and the permanent magnet of 5000Gs, the upper surface of described ferrospinel substrate is provided with resistive layer and microstrip circuit, a pin of described microstrip circuit is connected with resistive layer, resistive layer is used for absorbing microwave signal, be provided with permanent magnet on described microstrip circuit, described ferrospinel substrate is fixed on base, and the thickness of described ferrospinel substrate is 0.28-0.32mm.
Further, described microstrip circuit is electroplated at described Microwave Ferrite Substrates upper surface by photoetching technique.
Further, described resistive layer adopts thin-film technique to be arranged on described ferrospinel substrate, can better absorb microwave signal.
Further, described permanent magnet is the samarium cobalt permanent magnet body, and described base is made by magnetic metal materials processing, is preferably the alloy of iron or iron.
Further, the thickness of described ferrospinel substrate is preferably and is 0.3mm.
Technique scheme guarantees permanent magnet longitudinal magnetization ferrospinel substrate; the magnetization of ferrospinel substrate edge evenly; ground connection is good; and because the thermal coefficient of expansion of base and ferrospinel substrate is suitable; can protect the ferrospinel substrate when welding; reduce the risk that causes ferrospinel substrate cracking due to welding, improved the reliability of product.
Simultaneously, described ferrospinel substrate upper surface is taked polishing, utilizes chemical method degreasing and foreign particle, and the physical method effects on surface activates, removes absorption, guarantees the adhesive force of circuit rete.
Above-mentioned high-frequency microstrip substrate formula isolator is applicable to surface mounting technology, and is connected with microwave circuit by the gold wire bonding technology.
The utility model compared with prior art, its beneficial effect is: high-frequency microstrip substrate formula isolator described in the utility model, it is simple in structure, volume is little, lightweight, is applicable to surface mount and microcircuit is integrated, and frequency range is higher.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the schematic diagram after the utility model assembling.
Embodiment
The below is elaborated to technical solutions of the utility model, but protection range of the present utility model is not limited to described embodiment.
as illustrated in fig. 1 and 2, a kind of high-frequency microstrip substrate formula isolator, comprise iron-nickel alloy base 1, saturation magnetic moment is the ferrospinel substrate 4 of 5000Gs, resistive layer 2, microstrip circuit 3 and samarium cobalt permanent magnet body 5, described microstrip circuit 3 is electroplated at described ferrospinel substrate 4 upper surfaces by photoetching technique, described resistive layer 2 adopts thin-film technique to be arranged on described ferrospinel substrate 4 upper surfaces, a pin of described microstrip circuit 3 is connected with resistive layer 2, described samarium cobalt permanent magnet body 5 is glued on microstrip circuit 3 by epoxy resin, the central axis overlaid of the disk of the central axis of described samarium cobalt permanent magnet body 5 and microstrip circuit 3, described ferrospinel substrate 4 is welded on iron-nickel alloy base 1 by solder(ing) paste, the thickness of described ferrospinel substrate 4 is 0.28-0.32mm.
Described saturation magnetic moment is that ferrospinel substrate 4 Curie temperature of 5000Gs are high, and temperature stability is good, and the thickness of attenuate substrate can make isolator work in high-frequency range simultaneously.
Described high-frequency microstrip substrate formula isolator is applicable to surface mounting technology, and is connected with microwave circuit by the gold wire bonding technology.
The key technical indexes of above-mentioned isolator such as following table:
Frequency range 34.5-35.5GHz
Forward loss ≤1.0dB
Reverse isolation ≥18dB
Standing-wave ratio ≤1.4
Temperature range -55℃~+85℃
Joint form W→W
Overall dimension 5×5×3.5mm
As mentioned above, although represented and explained the utility model with reference to specific preferred embodiment, it shall not be construed as the restriction to the utility model self.Under the spirit and scope prerequisite of the present utility model that does not break away from the claims definition, can make in the form and details various variations to it.

Claims (5)

1. high-frequency microstrip substrate formula isolator, it is characterized in that, comprise that base, saturation magnetic moment are ferrospinel substrate, resistive layer, microstrip circuit and the permanent magnet of 5000Gs, the upper surface of described ferrospinel substrate is provided with resistive layer and microstrip circuit, a pin of described microstrip circuit is connected with resistive layer, be provided with permanent magnet on described microstrip circuit, described ferrospinel substrate is fixed on base, and the thickness of described ferrospinel substrate is 0.28-0.32mm.
2. high-frequency microstrip substrate formula isolator according to claim 1, is characterized in that, described microstrip circuit is electroplated at described Microwave Ferrite Substrates upper surface by photoetching technique.
3. high-frequency microstrip substrate formula isolator according to claim 1, is characterized in that, described resistive layer adopts thin-film technique to be arranged on described ferrospinel substrate.
4. high-frequency microstrip substrate formula isolator according to claim 1, is characterized in that, described permanent magnet is the samarium cobalt permanent magnet body, and described base is made by magnetic metal materials processing.
5. high-frequency microstrip substrate formula isolator according to claim 1, is characterized in that, the thickness of described ferrospinel substrate is 0.3mm.
CN 201220636392 2012-11-28 2012-11-28 High-frequency microstrip substrate-type isolator Expired - Fee Related CN202997017U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220636392 CN202997017U (en) 2012-11-28 2012-11-28 High-frequency microstrip substrate-type isolator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220636392 CN202997017U (en) 2012-11-28 2012-11-28 High-frequency microstrip substrate-type isolator

Publications (1)

Publication Number Publication Date
CN202997017U true CN202997017U (en) 2013-06-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220636392 Expired - Fee Related CN202997017U (en) 2012-11-28 2012-11-28 High-frequency microstrip substrate-type isolator

Country Status (1)

Country Link
CN (1) CN202997017U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103956559A (en) * 2014-05-15 2014-07-30 苏州华博电子科技有限公司 Tool for welding ferrite microstrip isolators and metal slides and welding method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103956559A (en) * 2014-05-15 2014-07-30 苏州华博电子科技有限公司 Tool for welding ferrite microstrip isolators and metal slides and welding method

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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: 20130612

Termination date: 20191128

CF01 Termination of patent right due to non-payment of annual fee