Dolph Microwave provides a series of high-performance standard rectangular waveguide filter products, which is divided into: low-pass, high-pass, band-pass and band-reject filters. The product frequency range covers 3.2-40GHz, and the typical standing wave within 10% of the waveguide bandwidth is less than 1.20. The amplitude-frequency characteristics of the four basic types of filters are shown below. Please call us with your specification and discuss your needs with one of our sales engineers.
| Type Code | Meaning | Type Code | Meaning |
| WBPF | Waveguide Band Pass Filters | WHPF | Waveguide High Pass Filters |
| WLPF | Waveguide Low Pass Filters | WBRF | Waveguide Band Reject Filters |
▪ Flange type: Multiple types available – see Dolph Microwave Flanges page.
▪ Finish: Corrosion protection plus black/grey top coat.
| Model No* | WG | Pass Band | Reject Band | VSWR | IL (dB) | Isolation | WG Type | Material | |
| Band | (GHz) | (GHz) | (Max.) | (Max.) | (dB) | IEC | EIA | ||
| DH-40WBPF | C | 3.7-4.2 | ＜3.7 | 1.2 | 0.4 | 45 | BJ40 | WR229 | Al/Cu |
| DH-70WBPF | C | 5.85-6.425 | ＜4.85 | 1.2 | 0.4 | 45 | BJ70 | WR137 | Al/Cu |
| DH-84WBPF | X | 7.9-8.4 | 7.25-7.75 | 1.2 | 0.6 | 60 | BJ84 | WR112 | Al/Cu |
| DH-100WBPF | X | 8月9日 | 7.125-7.235 | 1.2 | 0.5 | 30 | BJ100 | WR90 | Al/Cu |
| DH-120WBPF | Ku | 11.7-12.75 | 14-14.5 | 1.2 | 0.3 | 55 | BJ120 | WR75 | Al/Cu |
| DH-260WBPF | Ka | 24.5~27 | ≤22 | 1.2 | 0.3 | 40 | BJ260 | WR34 | Cu |
| ≤20GHz | 60 | ||||||||
| DH-320WBPF | Ka | 30.5-31.3 | 26-28.35 | 1.2 | 0.6 | 70 | BJ320 | WR28 | Cu |
| DH-40WLPF | C | 4.5-4.8 | 6.725-7.025 | 1.2 | 0.3 | 55 | BJ40 | WR229 | Al/Cu |
| DH-120WLPF | Ku | 11.6-12.8 | 13.5-15 | 1.2 | 0.25 | 60 | BJ120 | WR75 | Al/Cu |
| DH-220WLPF | Ka | 20.4-20.9 | 30-31 | 1.2 | 0.3 | 55 | BJ220 | WR42 | Cu |
| DH-260WHPF | Ka | 25-26 | 16 | 1.2 | 0.2 | 80 | BJ260 | WR34 | Cu |
| DH-320WHPF | Ka | 29-31.2 | 19-21 | 1.2 | 0.2 | 70 | BJ320 | WR28 | Cu |
| DH-22WHRF | S | 2.015-2.13 | 1.2 | 0.2 | 40 | BJ22 | WR430 | Al/Cu | |
| DH-70WHRF | C | 5.8-7.2 | 11.6-14 | 1.2 | 0.2 | 40 | BJ70 | WR137 | Al/Cu |
| DH-100WHRF | X | 8.5-10 | 17-20 | 1.2 | 0.2 | 40 | BJ100 | WR90 | Al/Cu |
*Indicates Model Number. See Ordering Information for complete part number.
A waveguide filter is an electronic filter constructed using waveguide technology. A waveguide is a hollow metal conduit in which electromagnetic waves can be transmitted. A filter is a device used to allow signals at certain frequencies to pass (passband) and reject other frequencies (stopband). Filters are a fundamental part of electronic engineering design and are widely used. These include signal selection and noise limitation.
A microwave filter is a device used to separate microwave signals of different frequencies. Its main function is to suppress unwanted signals so that they cannot pass through the filter, and only let the desired signals pass. It is composed of passive components such as LC, which are designed to be extremely low impedance at a certain frequency to shunt the harmonic current of the corresponding frequency, and its behavior mode is to provide a passive harmonic current bypass channel.
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