一、Characteristics
MBF2R7/3R7 thin-film bandpass filter is 50Ω input and output, gold wire bonding, frequency is 2.7GHz-3.7GHz, center frequency is 3.2GHz, bandwidth is 1000MHz, out-of-band rejection is greater than or equal to 40 dB@2.2GHz; Greater than or equal to 40 dB@4.4 GHz. The operating temperature is -55℃~+85℃, the storage temperature is -55℃~+125℃, and the maximum output power is 33dBm. It has the advantages of high performance, low temperature, wide temperature range, high power, small size, high line accuracy, good temperature characteristics, high integration, easy welding, light weight, good performance and high stability. Used in multi-module integrated circuits.
Thin-film bandpass filter
二、Electrical Characteristics
| Item | Min | Typical | Max | Unit |
Frequency center
| - | 3.2 | - | GHz |
| Band Width | 2.7 | - | 3.7 | GHz |
| Ripple in BW | - | - | 1 | dB |
| Insertion loss@ fo | - | 3.0 | - | dB |
| Return loss | - | 15 | - | dB |
Attenuation
| ≥ 40 @ 2.2 GHz | dB |
| ≥ 40 @ 4.4 GHz | dB |
三、Environmental parameter
| Operating temperature | -55℃~+85℃ |
| Storage temperature | -55℃~+125℃ |
| Input power (max) | 33dBm |
四、Dimension
Symbol
| Value（mm）
|
| Min | Nominal value | Max |
| L | 7.4 | - | 7.5 |
| W | 6.9 | - | 7.0 |
| T | - | 0.254 | - |
五、Characteristic curve
六、Proposed assembly drawing
Thin-film bandpass filter
七、Matters needing attention
1. It is recommended to use the device in separate cavities, about 0.2mm from the side wall, about 3mm from the surface of the top cover, and the device ports are interchangeable.
2. A low stress conductive adhesive, such as ME8465, is recommended for bonding the device.
3. The device should be installed on a carrier such as cov (recommended) or molybdenum copper and the thermal expansion coefficient of the substrate (6.5~8.0ppm/℃), and the thickness of the carrier is ≥0.2mm
4. When used, it is recommended that the bond of the microstrip line be matched with a T-shape structure, and the specific size of the T-shape is shown in the following figure.
Rogers 5880 10 mil
| Rogers 5880 10 mil |
 |  |
| Applicable frequency：DC ~ 38 GHz | Applicable frequency：DC ~ 32 GHz |
| Notice：The top of the T-shaped figure is 50 um from the edge of the base plate; Frequencies below 10 GHz do not need to be matched |
八、Application
Thin-film filters are widely used in mobile communications, satellite communications, aerospace, Internet of Things, radar, electronic countermeasures, precision guidance, national defense and military fields, as well as 5G communications, optical communications and other intelligent terminals and other equipment in the civilian field and civilian microelectronics communication equipment.
As a manufacturer of microwave electronic components, the company provides 3-13 order, 2GHz- 40GHz, 3dB bandwidth from 5% to 60%, coplanar waveguide input and output thin-film low-pass filter, thin-film high-pass filter, thin-film band-pass filter, thin-film band-stop filter. However, this product is a relatively customized product, and the device has been made and cannot be changed. When customizing the film-filter, the user should clearly put forward the parameter description, and the parameter requirements beyond the physical limit of the material can be negotiated by both sides to achieve the best indicators.
