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