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Filters Series UV22CO Combline Band-Pass Filters, 0.5 - 18 GHz, 2 - 67% Bandwidth Miniature or Standard • Exact Synthesis Design • Small Size • Spurious at Only Four Times the Passband Description The design of these particular filters is based on the exact synthesis theory. Utilizing combline filter techniques, these components offer high selectivity up through the third harmonic of the highest frequency in the pass-band. The use of resonators, smaller than a quarter wavelength, produces spurious pass-bands only at four times the fundamental pass-band (typical). Specifications Parameter Center Frequency Range (FO) 3 dB Relative Bandwidth Number of Sections Impedance VSWR at FO Insertion Loss Stopband Rejection Average Input Power Connectors Size Temperature Range Specification 0.5 to 18 GHz 2 to 67% 3 to16 50 ohms 1.5:1 typical Related to bandwidth and number of sections (see Figure 14) Related to bandwidth and number of sections (see rejection curves, Figures 15 to 19) 2W - 100W SMA, BNC, TNC, N Related to bandwidth and number of sections (details upon request) 0° to +50° (standard) How to order Standard Models Please specify your order by stating the model number according to the specifications table and the example below: UV22CO 7 2200 400 SF SF / − − − − 1 2 3 4 5 6 Legend: 1: Basic model number (UV 22CO) 2: Number of sections 3: Center frequency (MHz) 4: 1 dB relative bandwidth (MHz) 5: Input connector code 6: Output connector code Connector SMA BNC TNC N 39 Code Male Female SM BM TM NM SF BF TF NF Filters Custom Models Please specify your order by following the example below: a. Determination of Insertion Loss The typical insertion loss at center frequency is determined as follows: LC ( N + 0.4) + b dB 1 dB BW (%) Where: LC = Loss Constant (see Figure 14) 0 0.25 0.30 0.40 b= 1 dB BW (%) = up to 10% BW 11 to 30% BW 31 to 40% BW 41 to 67% BW 1 dB BW (MHz) × 100 Center Frequency (MHz) Loss Constant N = Number of sections Center Frequency (GHz) Figure 14. Loss Constant vs Center Frequency b. Rejection Curves and Determination of Number of Sections The rejection frequency is plotted in steps of 1 dB BW from the center frequency (FO): The number of 1 dB bandwidth = W W± = Rejection Frequency (MHz) - FO (MHz) Minimum 1 dB BW (MHz) Example: Center frequency 2200 MHz 1 dB BW 400 MHz Rejection at 1600 and 2800 MHz 50 dB min. 1 dB relative bandwidth will be: 400 ×100 = 18.2% 2200 Therefore, use the value of W to find the number of the required sections from Figure 19: F − FO 2800 − 2200 FAL − FO 1600 − 2200 = = −1.5 and AH = = +1.5 1 dB BW 400 1 dB BW 400 We see that than 7 sections are required. From Figure 14 the Loss Constant is 0.72. Then the Insertion Loss at Center Frequency will be: 0.72 × (7 + 0.4) + 0.25 = 0.55 dB 18.2 The part number will be: UV22 CO 7 2200 400 SF SF / − − − − 1 2 3 4 5 6 Legend: 1: Basic model number (UV22 CO) 2: Number of sections 3: Center frequency (MHz) 4: Relative 1 dB bandwidth (MHz) 5: Input connector code 6: Output connector code 40 Filters Figure 15. Rejection Curves, (dBs), 1dB BW = 5% Figure 16. Rejection Curves (dBs), 1 dB BW = 10% No. of 1 dB Bandwidths No. of 1 dB Bandwidths Figure 17. Rejection Curves (dBs), 1 dB BW = 20% Figure 18. Rejection Curves (dBs), 1 dB BW = 40% No. of 1 dB Bandwidths Figure 19. Rejection Curves (dBs), 1dB BW = 40% to 67% 41 Filters Example: UV22CO-7-2200/400-SF-SF, Combline Band-Pass Filter, 2000-2400 MHz Description This low insertion loss with high rejection combline Band-Pass filter utilizes small high "Q" resonators, extending the high selectivity through the third harmonic of the highest frequency in the passband. Electrical Specifications @ Temp.=25°C Parameter Center Frequency Insertion Loss at Center Frequency Pass-Band Pass-Band Insertion Loss Pass-Band Ripple Pass-Band VSWR Out-of-Band Rejection @DC-1750 MHz Out-of-Band Rejection @2700 MHz Out-of-Band Rejection @3000-4000 MHz Out-of-Band Rejection @4000-7200 MHz Input/Output Impedance RF Power Capability Specification Unit 2200 0.8 2000-2400 1.3 ±0.5 1.5:1 35 35 65 75 50 4 MHz dB MHz dB dB Note dB dB dB dB Ohm W Max. Max. Max. Min. Min. Min. Min. Nominal CW Min Max Unit -40 +90 °C Max. Environmental Characteristics Parameter Operating Temperature Mechanical Specifications Parameter Dimensions LxWxD RF Input/Output Connectors Material Specification Note 62x29x15 mm SMA, female, removable Aluminum/brass, silver plated Approximately 42