一、Characteristics
The function of the metal cavity filter (referred to as the cavity filter) is to filter noise, improve the receiving quality, suppress unnecessary signals and noise outside the frequency band, and achieve accurate filtering of specific signals. The cavity filter has a small insertion loss, high Q value, small standing wave, high out-of-band suppression, flat in-band frequency characteristics, high-end parasitic passband is far away, steep edge selectivity, and narrower bandwidth than the vertical component filter, input and output 50Ω impedance matching (if 75Ω is required, special explanation is required), input and output interfaces can be used interchangeably, easy to cascade use. And has a variety of interface types for users to choose, stable and reliable performance, high power and other advantages.
The metal cavity filter has a wide parameter range (30MHz - 40GHz), a full temperature range (-55℃~+85℃), stable and reliable performance, solid structure, and can meet the requirements of the military environment (-55℃~+85℃), with 1KW continuous wave and 8KW peak power processing capacity. The operating temperature of the cavity filter is: -55℃~+85℃, and the storage temperature range is: -65℃~+125℃.
Metal cavity filter
二、Model & Electrical characteristics
| Metal cavity filter (passive filter) type & parameter table |
| Part No | Center Frequency(MHz) | Band Width(MHz) | Insertion loss (dB)max | Ripple (dB)max | Output power (W) max | Attenuation (dB)min | Size(mm) |
| XF8C996C60M5A | 996 | 60 | 1.5 | 1.0 | 80 | 40@DC-960MHz | 137*71*54 |
| XF1040SF01 | 1040 | 249 | 1.8 | 1.6 | 80 | 40@DC-960MHz | 137*104*53 |
| XFF11R203A | 1092 | 246 | 1.5 | 1.0 | 80 | 60@1570-2400MHz | 137x104x53 |
| XFF8R161A | 1307.5 | 185 | 0.7 | 0.3 | 50 | 70@800~960MHz
| 100x30x15 |
| XFF6R180A | 1473.5 | 89 | 0.6 | 1.4 | 400 | 40@fo±95MHz | 56x36x60 |
| XFF8R140A | 1095.5 | 259 | 2 | 1 | 10 | 40@30K-960MHz | 128x90x46 |
| XFF6R142A | 1150 | 100 | 0.5 | 1.5 | 500 | 50@fo±100MHz | 92x55x30 |
| XFF5R078A | 1615 | 10
| 1.5 | 0.3 | 100 | 60@157±10MHz | 55×35×17 |
| XFF6R056A | 8300 | 600
| 1 | 0.5 | 40 | 60@DC~7250MHz | 65x15x12 |
| XFF6R151A | 1400 | 100
| 0.6 | 0.2 | 60 | 40@126±10MHz | 66×26×12 |
| XFF6R155A | 1720 | 108
| 0.7 | 0.3 | 60 | 28@fo±100MHz | 81x35x20 |
| XFF2300C200A | 2300 | 200 | 1.3 | 0.6 | 30 | 55@fo±200MHz | 78×26×14 |
| XFF4R077A | 2277 | 22
| 0.6 | 0.3 | 100 | 60@249±10MHz | 45×46×11 |
| XFF8R163A | 2350
| 200 | 1.0 | 0.5 | 40 | 40@2170~2200MHz | 78x26x14 |
| XFF4R162A | 1995 | 30
| 0.8 | 0.3 | 100 | 55@2170~2200MHz | 46x45x12 |
| XFF4R174A | 3800 | 200 | 0.6 | 0.5 | 100 | 60@7400~7800MHz | 60x35x15 |
| XFF5R202A | 1501 | 56 | 0.7 | 1.4 | 60 | 40@fo±75MHz | 50x32x34 |
| XFF5R211A | 10000 | 100 | 1.5 | 1 | 10 | 60@fo±300MHz | 40x25x9 |
| Note: Due to many product models, only some representative models are listed in the table |
三、Application & attention
Because the cavity filter has a good frequency selection filtering effect in the circuit and electronic high frequency system, it is widely used in the civil field of mobile communications, satellite communications, aerospace, Internet of things, radar, electronic countermeasures, precision guidance, national defense and military fields, as well as 5G communication, optical communication and other intelligent terminals. When in use, the input/output outlet can be used interchangeably, but pay attention to good grounding of the housing, otherwise it will affect out-of-band suppression and flatness indicators. Products should be stored in the ambient temperature of -10℃~40℃, relative humidity is not more than 80%, the surrounding environment is not acidic, alkaline and other harmful gases in the warehouse. Do not soak when cleaning, it is recommended to wipe with alcohol.
The company has a variety of interface types of metal cavity filters (passive filters) for users to choose, can be customized 3-13 orders, 3dB bandwidth from less than 0.5% to more than 66% bandwidth, frequency can be done from 30MHz to 40GHz, size according to the requirements of the index can be flexible production (L: 20mm-40mm; W: 12mm-15mm; H: 5mm-7mm) bandpass filter, cavity power splitter, cavity low-pass filter, cavity high-pass filter, this kind of product belongs to the strong customization of the device, the parameter requirements of the device should be clearly stated before the order, and the parameter requirements beyond the physical limit of the material can be negotiated by both sides to achieve the best indicators.
