Waveguide components
- The cavity has a conductive-oxidation finish.
- Cavities are connected by screws.
- Ferrite substrate, supporting medium, balance tab, permanent magnet and cavity are assembled using a bonding process.
Waveguide Ferrite Devices
Waveguide ferrite devices play a pivotal role in controlling and manipulating microwave signals within waveguide systems. They include circulators and isolators, which are essential for ensuring unidirectional flow and preventing backward signal interference. These devices find extensive use in military, telecommunications, and aerospace applications, offering high isolation and low insertion loss to maintain system performance.
Dolph Microwave · Ferrite Product Series
Waveguide Ferrite Devices, Isolators & Circulators
Ferrite components for controlling the direction of microwave energy in a waveguide system. The range includes waveguide isolators and circulators, with standard models and custom mechanical or electrical configurations.
The published 30 MHz–110 GHz figure covers Dolph Microwave’s broader ferrite product series. It is not the operating range of one waveguide part. Use the model-specific frequency, insertion loss, isolation, VSWR and power data below when choosing a device.
The original product image from this page will load here on the live product page.
Product overview
What is included in this ferrite range
The original product page covers waveguide ferrite devices and the wider ferrite component family. For a real order, the exact device is selected by frequency band, RF function, power level, waveguide interface and required mechanical envelope.
30 MHz–110 GHzPublished coverage for the broader ferrite product series.
Isolators & circulatorsWaveguide examples are listed with published electrical and typical values.
Several structuresStripline, coaxial, microstrip, waveguide, coaxial-stripline and waveguide-coaxial are listed.
Standard or customMechanical and electrical changes can be reviewed against the project requirement.
Original page features retained
- Wide frequency range: frequency coverage stated as 30MHz to 110GHz for the ferrite family.
- Diverse product line: stripline/coaxial/microstrip/waveguide isolators, circulators, switches, isolation loop components, dividers, filters and more.
- Varied structures: stripline, coaxial, microstrip, waveguide, coaxial-stripline and waveguide-coaxial.
- Harsh-environment use: the product literature states resistance to shock and vibration and lists airborne, bomb-borne, ship-borne and aerospace use cases.
Choose the RF function first
Isolator or circulator?
The names are related, but they are not interchangeable. Start with what the RF path needs to do, then match the operating band and power condition.
Waveguide isolator
Use an isolator when the main job is to pass power in the intended direction and reduce energy traveling back toward the source. The important order data are the full frequency band, forward power, reflected-power condition, insertion loss, isolation, VSWR, waveguide size and flange.
View Dolph waveguide isolators · See published examples below
Waveguide circulator
Use a circulator when power needs to move from one port to the next in a defined direction. Port layout, insertion loss, isolation, power duty and the load connected to the remaining port all matter.
View Dolph waveguide circulators · See published examples below
High-power requirement
If average or pulse power is the main constraint, do not apply a rating from another ferrite model. Dolph also lists a dedicated high-power differential phase-shift circulator & isolator range.
Original product specification example
Published family-level specification
This table keeps the four fields and values shown on the original product page. These values describe the product family, not a guaranteed specification for one part number.
| Feature | Specification |
|---|---|
| Frequency Range | 30MHz to 110GHz |
| Types | Isolators, Circulators, etc. |
| Structures | Coaxial, Microstrip, Waveguide |
| Reliability | Suitable for harsh environments |
Waveguide isolator data
Published waveguide isolator examples
The first line in a paired cell is the published electrical specification. The second line is the published typical value from the Ferrite Product Series PDF.
| Device | Frequency Spec / typical | VSWR Spec / typical | Insertion loss Spec / typical | Isolation Spec / typical | Power Published spec | Drawing |
|---|---|---|---|---|---|---|
| S-Band Waveguide Isolator | 2.7–2.9 GHz2.7–2.9 GHz | ≤1.151.07 | ≤0.2 dB0.18 dB | ≥20 dB27 dB | 4KW (Pulse) | PDF p. 5 |
| K-Band Waveguide Isolator | 18–26.5 GHz18–26.5 GHz | ≤1.21.15 | ≤0.3 dB0.25 dB | ≥20 dB23 dB | 150W (CW) | PDF pp. 5–6 |
| X-Ku Band Waveguide Isolator | 8–18 GHz8–18 GHz | ≤1.51.45 | ≤0.6 dB0.5 dB | ≥15 dB17 dB | 250W (CW) | PDF pp. 6–7 |
| Ka-Band Waveguide Isolator | 26.5–40 GHz26.5–40 GHz | ≤1.51.45 | ≤0.5 dB0.45 dB | ≥15 dB17 dB | 80W (CW) | PDF pp. 7–8 |
| 92–96GHz Waveguide Isolator | 92–96 GHz92–96 GHz | ≤1.351.3 | ≤0.8 dB0.7 dB | ≥18 dB20 dB | 1W | PDF pp. 8–9 |
Outline drawings and dimensions are provided in millimetres in the original PDF. Typical values are not acceptance limits. Confirm the exact model, test conditions and agreed specification before ordering.
More product views
See the isolator and circulator ranges separately
These links stay inside Dolph Microwave and help buyers move from the general ferrite family to a more specific product range. Each card loads the product image from its own page.
Waveguide Isolators
Dedicated isolator range for reverse-power protection and one-way RF transmission.
View isolator range →Waveguide Circulators
Dedicated circulator range for directional routing between waveguide ports.
View circulator range →High-Power Circulator & Isolator
Separate product family for applications where higher power is the main selection constraint.
View high-power range →Waveguide circulator data
Published waveguide circulator examples
These rows come from the same Ferrite Product Series document and keep the published electrical, typical and power values separate.
| Device | Frequency Spec / typical | VSWR Spec / typical | Insertion loss Spec / typical | Isolation Spec / typical | Power Published spec | Drawing |
|---|---|---|---|---|---|---|
| S-Band Waveguide Circulator | 2.7–2.9 GHz2.7–2.9 GHz | ≤1.21.09 | ≤0.2 dB0.18 dB | ≥25 dB30 dB | 40KW (pulse) | PDF pp. 13–14 |
| S-Band Phase Shift Waveguide Circulator | 2.998 GHz2.998 GHz | ≤1.151.08 | ≤0.2 dB0.15 dB | ≥28 dB31 dB | 40MW (pulse) | PDF pp. 14–15 |
| X-Band Phase Shift Waveguide Circulator | 10–10.6 GHz10–10.6 GHz | ≤1.151.09 | ≤0.3 dB0.2 dB | ≥20 dB25 dB | 28KW (pulse) | PDF pp. 15–16 |
| 92–96GHz Waveguide Circulator | 92–96 GHz92–96 GHz | ≤1.351.3 | ≤0.8 dB0.7 dB | ≥18 dB20 dB | 1W | PDF pp. 16–17 |
The published 40MW pulse value belongs to the 2.998 GHz S-band phase-shift circulator row only. Do not use it as a family-wide power rating.
Broader ferrite product series
Other structures listed in the same PDF
The page is about waveguide ferrite devices, but the linked ferrite document also contains stripline, coaxial, microstrip and SMT examples. They are kept here so buyers who need a different package do not lose the original product-series data.
Show published non-waveguide isolator examples
| Device | Frequency Spec / typical | VSWR / Return Loss Spec / typical | Insertion loss Spec / typical | Isolation Spec / typical | Power |
|---|---|---|---|---|---|
| X-band Stripline Isolator | 8–12 GHz8–12 GHz | VSWR ≤1.201.10 | ≤0.4 dB0.25 dB | ≥20dB30 dB | 50W (CW) |
| X-band Stripline Isolator | 8–8.4 GHz8–8.4 GHz | VSWR ≤1.251.08 | ≤0.3 dB0.18 dB | ≥20dB25 dB | 200 W (pulse) |
| Ku-band Stripline Isolator | 14–18 GHz14–18 GHz | VSWR ≤1.351.28 | ≤0.5 dB0.5 dB | ≥16 dB16.5 dB | 30W (CW) |
| C-Ku Band Microstrip Isolator | 6–18 GHz6–18 GHz | VSWR ≤1.71.62 | ≤1.0 dB0.9 dB | ≥13 dB15 dB | 16W (CW) |
| S-band Coaxial Isolator | 2.7–2.9 GHz2.7–2.9 GHz | VSWR ≤1.201.10 | ≤0.3 dB0.2 dB | ≥20dB25 dB | 60W (CW) |
| S-band Stripline Isolator | 2.7–2.9 GHz2.7–2.9 GHz | Return loss ≥20 dB24 dB | ≤0.25 dB0.19 dB | ≥20dB24 dB | 2KW (pulse) |
Show published non-waveguide circulator examples
| Device | Frequency Spec / typical | VSWR Spec / typical | Insertion loss Spec / typical | Isolation Spec / typical | Power |
|---|---|---|---|---|---|
| C-Band Coaxial Circulator | 4–8 GHz4–8 GHz | ≤1.351.3 | ≤0.5 dB0.45 dB | ≥17 dB19 dB | 80W (pulse) |
| 128MHz Stripline Circulator | 0.128 GHz0.128 GHz | ≤1.21.15 | ≤0.40 dB0.32 dB | ≥20dB25 dB | 22KW (pulse); Average power 2KW |
| 180.7–190.7MHz Stripline Circulator | 0.1807–0.1907 GHz0.1807–0.1907 GHz | ≤1.21.15 | ≤0.30 dB0.25 dB | ≥20dB25 dB | 2KW CW |
| S-Band Stripline Circulator | 2.9–3.3 GHz2.9–3.3 GHz | ≤1.221.17 | ≤0.30 dB0.23 dB | ≥20 dB22 dB | 150 W (Pules) |
| X-band SMT Circulator | 8.5–10.5 GHz8.5–10.5 GHz | ≤1.31.25 | ≤0.45 dB / ≤0.90 dB0.40 dB / 0.82 dB | ≥18 dB / ≥30 dB19 dB / 31 dB | 20W (pulse) |
| Ku-band Stripline Circulator | 16–17 GHz16–17 GHz | ≤1.251.18 | ≤0.4 dB0.35 dB | ≥20 dB22 dB | 60W (pulse) |
| C-band Microstrip Circulator | 5–6 GHz5–6 GHz | ≤1.251.16 | ≤0.5 dB / ≤1.0 dB0.44 dB / 0.92 dB | ≥18 dB / ≥30 dB19.5 dB / 31 dB | 30W (pulse) |
| Ku-band Microstrip Circulator | 14–18 GHz14–18 GHz | ≤1.41.27 | ≤0.65 dB / ≤1.1 dB0.6 dB / 1.0 dB | ≥13 dB / ≥25 dB15 dB / 27 dB | 20W (pulse) |
| Ka-band Microstrip Circulator | 26.5–40 GHz(10%) 33–37 GHz | ≤1.31.25 | ≤0.8 dB0.6 dB | ≥18 dB19 dB | 15W (pulse) |
Construction details
Processes listed in the ferrite series document
These are the manufacturing details stated for the named component categories. They should not be read as a promise that every model uses every material or process.
Microstrip components
- Input/output thin-film microstrip circuits are formed by vacuum sputtering.
- The listed layers are tantalum nitride, chromium, copper and gold.
- The microstrip circuit substrate and bottom plate use solder paste or a solder lug.
- Substrate, supporting medium, balance tab and permanent magnet are bonded.
Stripline / coaxial components
- The stripline circuit is copper-plated or silver-plated.
- The resistor and cavity use a soldering process; the published soldering temperature is 205 °C.
- Ferrite substrate, supporting medium, balance tab, permanent magnet and magnetic circuit use X98-11 acetal drying glue, cured at 150 °C.
- The shell coating is copper-plated.
Applications stated on the original page
Where these ferrite devices are used
Application names are kept from the original product page. The final device still needs to be checked against the actual operating and environmental conditions.
Cellular backhaul PTP radios
Microwave point-to-point radio links where reverse-signal control and directional RF routing are required.
Defense systems
Radar and communications. The ferrite document also lists airborne, bomb-borne and ship-borne use cases.
Space applications
Satellite communication and aerospace projects, subject to the qualification needed for the specific program.
Commercial telecommunications
Networking and broadcast microwave systems where insertion loss, isolation and interface fit need to be controlled.
Scientific research
Physics and engineering laboratory setups that use ferrite components for routing, isolation or test-system protection.
For a usable quotation
Send the RF data that changes the part
A short RFQ with the right information is more useful than a long general description. If a parameter is not fixed yet, send the system drawing or mating-part information and mark it as open for review.
Email RFQ details to [email protected]- Required functionIsolator, circulator or another ferrite component.
- Operating frequencyFull band, not only the center frequency.
- Power conditionCW or pulse power; include pulse width and duty cycle when relevant.
- RF targetsMaximum insertion loss, minimum isolation and permitted VSWR or return loss.
- Waveguide interfaceWR size, port arrangement and both flange designations.
- Mechanical limitsMaximum envelope, port orientation, mounting and available space.
- EnvironmentOperating temperature and any shock, vibration or platform requirements.
- DocumentationQuantity, drawing format, RF test data and qualification records needed with the order.
Customization and support
Standard models and project-specific designs
The original page states that Dolph Microwave can develop ferrite devices to suit mechanical and electrical requirements, including high-power applications. It also lists soft ferrites and metallic powders used for components such as lightweight microwave and infrared absorbing materials. Those broader material capabilities are not standard features of every waveguide ferrite device.
Before changing a standard device
Start by checking whether the required frequency band, insertion loss, isolation and power already fit a published configuration. Custom work is most useful when the flange, envelope, port layout, power condition or electrical target is outside the standard option.
Waveguide circulators · Waveguide isolators · High-power differential phase-shift devices
Technical references
Downloads and useful engineering reading
Keep the product PDF and flange reference with the RFQ. The internal engineering links are useful when frequency band, power or mating interface still needs to be checked.
Ferrite Product Series · PDF24-page manufacturer document with ferrite family features, production technology, isolator and circulator examples, electrical data and outline drawings.Open PDF ↗
Flange Types & Designations · PDFDolph reference for waveguide flange naming and IEC / EIA interface designations.Open PDF ↗
Useful internal links
Waveguide Power HandlingCW power, peak power, breakdown limits and cooling checks.
Waveguide Frequency Bands ChartWR sizes, operating ranges and cutoff-frequency reference.
Waveguide Flange Size GuideEIA / IEC naming, flange fit and gasket considerations.
WR42 Slim Type Waveguide Isolator, 22–24 GHzPublished model example with VSWR, insertion loss, isolation, power, flange and finish.
Circulator design emphasisBackground on ferrite selection, bias point, insertion loss and isolation.
Technical note: Family coverage, typical values and individual model specifications are different things. For procurement, use the exact model drawing, flange designation, test conditions and specification agreed in the quotation. The original product page also states that standard catalog models and custom designs are available.
