一、Characteristics
Cavity microstrip low-pass filter (also known as suspended microstrip LPF filter) by the metal overall cutting, built-in microstrip line, high processing accuracy, cavity polishing and coating, solid structure, high reliability, frequency range of 0.3-18GHz, input/output 50Ω impedance matching, easy to cascade use; Stable and reliable performance in the full temperature range, meeting the requirements of military working environment (-55℃ ~ +85℃); High near-end rejection, good phase consistency, small volume, high Q value, small standing wave, flat in-band amplitude-frequency characteristics, small insertion loss, high out-of-band rejection; It can meet the continuous impact force of 20 grams in 11 milliseconds, and can meet the continuous vibration of 10 grams in the frequency of 10 ~ 2000Hz; The storage temperature ranges from -65 ° C to +90 ° C, the power ranges from 10 to 200W, and the relative humidity ranges from 0 to 95%. When the microstrip cavity low-pass filter is used, pay attention to the good grounding of the shell, otherwise it will affect the out-of-band suppression and flatness index.
Cavity microstrip low-pass filte
二、Model & Electrical characteristics
| Cavity low-pass filter (cavity LPF filter) model and parameter table |
| Part No | Frequency(GHz) | Insertion loss(dB)
| V.S.W.R | Attenuation(dBc)
| Power(W) | Connector |
| LPF1000 | DC ~ 1.0 | ≤ 1.0 | ≤ 1.8 | ≥ 50 @ 1.2 - 3.0 GHz | 15 | SMA-F |
| LPF1500 | DC ~ 1.5
| ≤ 1.5 | ≤ 1.8 | ≥ 60 @ 2.0 GHz |
|
|
| LPF2000 | DC ~ 2.0 | ≤ 1.5 | ≤ 1.5 | ≥ 40 @ 4.0 GHz | 15 | SMA-F |
| LPF2400 | DC ~ 2.4 | ≤ 1.0 | ≤ 1.8 | ≥ 70 @ 2.9 - 6.0 GHz | 15 | SMA-F |
| LPF2400 | DC ~ 3.0 | ≤ 1.0 | ≤ 1.6 | ≥ 60 @ 3.6 - 6.0 GHz | 15 | SMA-F |
| LPF3150 | DC ~ 3.15 | ≤ 2.0 | ≤ 1.6 | ≥ 60 @ 3.9 - 6.3 GHz | 15 | SMA-F |
| LPF3600 | DC ~ 3.6 | ≤ 1.5 | ≤ 1.8 | ≥ 40 @ 4.5 - 10 GHz | 15 | SMA-F |
| LPF4000 | DC ~ 4.0 | ≤ 1.2 | ≤ 1.8 | ≥ 50 @ 4.6 - 10 GHz | 15 | SMA-F |
| LPF4100 | DC ~ 4.1 | ≤ 1.5 | ≤ 1.6 | ≥ 50 @ 4.55 - 10 GHz | 15 | SMA-F |
| LPF4135 | DC ~ 4.135 | ≤ 3.0 | ≤ 1.6 | ≥ 65 @ 5.05 - 8.63 GHz | 15 | SMA-F |
| LPF4450 | DC ~ 4.45 | ≤ 1.5 | ≤ 1.6 | ≥ 30 @ 4.718 - 5.5 GHz | 15 | SMA-F |
| LPF4500 | DC ~ 4.5 | ≤ 1.2 | ≤ 1.8 | ≥ 50 @ 5.8 - 12.0 GHz | 15 | SMA-F |
| LPF5000 | DC ~ 5.0 | ≤ 1.2 | ≤ 2.0 | ≥ 50 @ 5.8 - 13.0 GHz | 15 | SMA-F |
| LPF6000 | DC ~ 6.0 | ≤ 1.2 | ≤ 2.0 | ≥ 50 @ 6.9 - 14.5 GHz | 15 | SMA-F |
| LPF6300 | DC ~ 6.3 | ≤ 1.2 | ≤ 2.0 | ≥ 50 @ 8.0 - 15.0 GHz | 15 | SMA-F |
| LPF6950 | DC ~ 6.95 | ≤ 1.5 | ≤ 1.6 | ≥ 50 @ 8.0 - 14 .0GHz | 15 | SMA-F |
| LPF7000 | DC ~ 7.0 | ≤ 1.5 | ≤ 1.8 | ≥ 55 @ 8.4 - 18.0 GHz | 15 | SMA-F |
| LPF7200 | DC ~ 7.2 | ≤ 1.5 | ≤ 1.8 | ≥ 50 @ 9.2 - 16.0 GHz | 15 | SMA-F |
| LPF9000 | DC ~ 9.0 | ≤ 1.2 | ≤ 2.0 | ≥ 45 @ 11.5 - 17.0 GHz | 15 | SMA-F |
| LPF10000 | DC ~ 10.0 | ≤ 1.2 | ≤ 1.6 | ≥ 30 @ 12.0 - 20.0 GHz | 15 | SMA-F |
| LPF12000 | DC ~ 12.0 | ≤ 1.5 | ≤ 1.8 | ≥ 50 @ 14.0 - 20.0 GHz | 15 | SMA-F |
| LPF13000 | DC ~ 13.0 | ≤ 1.5 | ≤ 1.8 | ≥ 50 @ 15.0 - 20.0 GHz | 15 | SMA-F |
| Note: Due to many product models, only some representative models are listed in the table |
三、Application & attention
The cavity microstrip low-pass filter is usually used in the microwave system within 20GHz frequency converter, frequency multiplier or multichannel frequency division system to separate or combine different frequency signals, so that the electromagnetic spectrum can be selected according to the application. Or limit the high-power transmitter to transmit signals in the specified frequency band to prevent the receiver from interference outside the working frequency band.
Cavity microstrip low-pass filter (cavity HPF filter) is a relatively strong customization of the product, coupled with the microwave electronic components of the indicators between the interaction, mutual influence, the product has been made can not be changed. Therefore, the user needs to clearly specify the indicator requirements before customization, and the parameter requirements beyond the physical limit of the material can be negotiated by both sides to achieve the best indicator. The company can customize cavity filter, high-pass filter, low-pass filter, band-stop filter, band-pass filter.
