5721 Tri-Notch Filter
The UHF Tunable Tri-Notch filter is designed with 3 independent lumped element notch filters.
The design topology for the filter was selected to achieve constant absolute notch bandwidth over the 486-750MHz frequency range.
Each notch can be programmed to turn on (active mode) or off (bypass mode).
Each notch is tunable over a specific frequency range (or tuning zone). The tuning frequency step for each notch is 100KHz (tuning resolution).
The filter is equipped with internal temperature compensation that regulates the Temperature Drift of the Notch Frequency and keeps the notch rejection better than 15dB over the entire operating temperature range.
The usable passband frequency range is 225 to 750MHz.
- Specifications
Specifications
| Passband Frequency Range | 225 to 750MHz |
| Notch 1 Center Frequency (NCF) Range | 486 – 573.9MHz |
| Notch 2 Center Frequency (NCF) Range | 574 – 661.9MHz |
| Notch 3 Center Frequency (NCF) Range | 662 – 750MHz |
| Notch Rejection at NCF±2MHz | 15dB min |
| Passband Insertion Loss (All Notches Off) | 1.3dB max |
| Insertion Loss at NCF±10MHz (1 Notch Active) | 5.3dB max |
| Insertion Loss at NCF±10MHz (2 Notches Active) * | 6.2dB max *** |
| Insertion Loss at NCF±10MHz (3 Notches Active) ** | 7.0dB max *** |
| Impedance (Input/Output) | 50 Ω |
| VSWR | 2.5:1 |
| Temperature Range | -40°C to +85°C |
| Notch Drift Over Temperature | Internally Compensated |
| RF Power Handling | +25dBm |
| IIP3 | TBD |
| DC Power | |
| DC Voltage | 3.3 VDC ±0.3 VDC |
| DC Current Max | 55mA |
| Control Interface | SPI Serial Input |
| Tuning Resolution | 100KHz |
| Switching Speed, 90% RF Power (typical) | < 50μsec |
| Dimensions [L x W x H] | 1.70 X 1.80 X 0.35 inches
43.20 X 45.20 X 8.90 mm |