一、Characteristics
MBF1R98/2R08 is a thin-film bandpass filter (also known as thin film microstrip filter), using ceramic substrate, gold wire bonding microstrip process, through electroplating, lithography, sputtering and other high-precision thin-film semiconductor processing and welding process, so as to form a thin-film circuit. The MBF1R98/2R08 thin-film bandpass filter is 50Ω input and output, the frequency is 1.98GHz-2.08GHz, the bandwidth is 0.1GHz, the center frequency is 2.03GHz, and the out-of-band rejection is greater than or equal to 40 dB@1.5GHz. Greater than or equal to 40 dB@2.5 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.
Microstrip thin-film filter
二、Electrical Characteristics
| Item | Min | Typical | Max | Unit |
Center frequency
| - | 2.03 | - | GHz |
| Band Width | 1.98 | - | 2.08 | GHz |
| Ripple in BW | - | - | 1 | dB |
| Insertion loss@ fo | - | 4.2 | - | dB |
| Return loss | - | 15 | - | dB |
Attenuation
| ≥ 40 @ 1.5 GHz | dB |
| ≥ 40 @ 2.5 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 | 6.2 | - | 6.3 |
| W | 7.0 | - | 7.1 |
| T | - | 0.254 | - |
Thin-film bandpass filte size
五、Characteristic Curve
Attenuation ＆ Return loss VS Frequency Distal Attenuation VS Frequency
六、Recommended Assembly Drawing
Recommended assembly drawing
七、Attention
1. The device is recommended to be used 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. Devices are recommended to be bonded with a low-stress conductive adhesive such as ME8465
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、Product application
MBF1R98/2R08 thin-film bandpass filter is widely used in mobile communications, satellite communications, aerospace, Internet of Things, radar, electronic countermeasures, precision guidance, national defense military fields and 5G communication, optical communication and other intelligent terminals of civil microelectronics communication.
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 thin-film bandpass filter, the user needs to put forward a clear parameter description, and the parameter requirements beyond the physical limit of the material can be negotiated by both sides to achieve the best indicators.
