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A directional coupler is used to sample a portion of an input signal for test and/or monitoring purposes. This “sample” signal is typically of much less power than the original input signal.
The coupling value of a directional coupler defines the difference in power between the input signal and the “sample” signal as it is observed at the coupled port. DETI offers a complete line of 6, 10, 16, 20 and 30 dB couplers covering selected frequency bands up to 18 GHz.
Coupling
The attenuation of a signal injected into the input port as seen at the coupled port.
Coupling flatness
The maximum variation in the coupling value over a specified frequency range.
Insertion Loss
The loss of unrecoverable power dissipated within the unit.
The following coupling loss have to be added to obtain mainline loss.
Coupling Loss
Power lost from the input signal due solely to the power transferred to the coupling arm of the devise.
Mainline loss
The difference in power between the input signal and the output signal. It is the Insertion Loss and Coupling Loss.
Directivity
The level of output power at the coupled port when a signal is injected into the unit in the desired direction minus t he level of output power at t he coupled port when the same signal is inje cted in the opposite direction. In a bidirectional unit, it is the difference in output power between the two coupled ports as seen from a constant signal in the same direction.
VSWR
The VSWR (Voltage Standing Wave Ratio) at any given port (with all other ports terminated) defines the degree of mismatch between the input signal and the input port and thus is a measure of the loss of input signal at that port.
COAXIAL DIRECTIONAL COUPLERS
STANDARD UNI / BI DIRECTIONAL COUPLEUR
| Freq.min. (MHz) |
Freq.max. (MHz) |
Coupling (dB) |
VSWR max. (Main line) | Directivity (dB) min. |
IL (dB max.) | Power max. (W CW max.) | P/N |
|---|---|---|---|---|---|---|---|
| 470 | 870 | 6 | 1,25:1 | 18 | 0.45 | 30 | CD-1-470-870-6-30-SF |
| 470 | 870 | 10 | 1,25:1 | 18 | 0.45 | 30 | CD-1-470-870-10-30-SF |
| 470 | 870 | 20 | 1,25:1 | 18 | 0.45 | 30 | CD-1-470-870-20-30-SF |
| 500 | 2000 | 20 | 1,20:1 | 23 | 0.4 | 30 | CD-1-500-2000-20-30-SF |
| 500 | 4300 | 10 | 1,25:1 | 20 | 0.5 | 50 | CD-1-500-4300-10-50-NF |
| 500 | 4300 | 30 | 1,25:1 | 20 | 0.5 | 50 | CD-1-500-4300-30-50-NM |
| 1000 | 2000 | 10 | 1,25:1 | 18 | 0.45 | 30 | CD-1-1000-4000-6-30-SF |
| 1000 | 2000 | 20 | 1,25:1 | 18 | 0.45 | 30 | CD-1-1000-4000-6-30-SF |
| 1000 | 4000 | 6 | 1,30:1 | 20 | 1 | 30 | CD-1-1000-4000-6-30-SF |
| 1000 | 4000 | 10 | 1,30:1 | 20 | 1 | 30 | CD-1-1000-4000-10-30-SF |
| 1000 | 4000 | 20 | 1,30:1 | 20 | 1 | 30 | CD-1-1000-4000-20-30-SF |
| 1000 | 12400 | 10 | 1,35:1 | 15 | 1.1 | 30 | CD-1-1000-12400-10-30-SF |
| 1000 | 12400 | 20 | 1,35:1 | 12 | 1.1 | 30 | CD-1-1000-12400-20-30-SF |
| 1000 | 18000 | 10 | 1,35:1 | 16 | 1.3 | 30 | CD-1-1000-18000-10-30-SF |
| 1000 | 18000 | 16 | 1,35:1 | 12 | 1.2 | 30 | CD-1-1000-18000-16-30-SF |
| 1000 | 18000 | 20 | 1,35:1 | 12 | 0.9 | 30 | CD-1-1000-18000-10-30-SF |
| 2000 | 4000 | 10 | 1,25:1 | 12 | 0.45 | 30 | CD-1-2000-4000-10-30-SF |
| 2000 | 4000 | 20 | 1,25:1 | 12 | 0.45 | 30 | CD-1-2000-4000-20-30-SF |
| 2000 | 8000 | 10 | 1,30:1 | 20 | 1 | 30 | CD-1-2000-8000-10-30-SF |
| 2000 | 8000 | 20 | 1,30:1 | 20 | 0.45 | 30 | CD-1-2000-8000-20-30-SF |
| 2000 | 18000 | 6 | 1,40:1 | 12 | 0.7 | 30 | CD-1-2000-18000-6-30-SF |
| 2000 | 18000 | 10 | 1,40:1 | 12 | 0.6 | 30 | CD-1-2000-18000-10-30-SF |
| 2000 | 18000 | 16 | 1,40:1 | 12 | 0.6 | 30 | CD-1-2000-18000-16-30-SF |
| 2000 | 18000 | 20 | 1,40:1 | 12 | 0.7 | 30 | CD-1-2000-18000-20-30-SF |
| 2500 | 3000 | 10 | 1,25:1 | 27 | 0.3 | 50 | CD-1-2500-3000-10-50-SF |
| 3650 | 6450 | 10 | 1,30:1 | 18 | 0.7 | 30 | CD-1-3650-6450-10-30-SF |
| 3650 | 6450 | 20 | 1,30:1 | 18 | 0.9 | 30 | CD-1-3650-6450-20-30-SF |
| 3650 | 6450 | 30 | 1,30:1 | 18 | 0.9 | 30 | CD-1-3650-6450-30-30-SF |
| 4000 | 8000 | 10 | 1,30:1 | 15 | 0.7 | 30 | CD-1-4000-8000-10-30-SF |
| 4000 | 12400 | 10 | 1,30:1 | 17 | 0.7 | 30 | CD-1-4000-12400-10-30-SF |
| 4000 | 12400 | 20 | 1,30:1 | 17 | 0.6 | 30 | CD-1-4000-12400-20-30-SF |
| 4000 | 18000 | 10 | 1,40:1 | 12 | 1.0 | 30 | CD-1-4000-18000-10-30-SF |
| 4000 | 18000 | 20 | 1,40:1 | 12 | 0.9 | 30 | CD-1-4000-18000-20-30-SF |
| 4000 | 20000 | 6 | 1,40:1 | 15 | 1.0 | 30 | CD-1-4000-20000-6-30-K |
| 4000 | 20000 | 10 | 1,40:1 | 15 | 1.0 | 30 | CD-1-4000-20000-10-30-K |
| 4000 | 20000 | 20 | 1,40:1 | 15 | 0.7 | 30 | CD-1-4000-20000-20-30-K |
| 6000 | 18000 | 6 | 1,40:1 | 15 | 1.0 | 30 | CD-1-6000-180000-6-30-SF |
| 6000 | 18000 | 10 | 1,40:1 | 15 | 1.0 | 30 | CD-1-6000-180000-10-30-SF |
| 6000 | 18000 | 20 | 1,40:1 | 12 | 0.9 | 30 | CD-1-6000-180000-20-30-SF |
| 7500 | 16000 | 20 | 1,40:1 | 15 | 1.1 | 30 | CD-1-7500-16000-20-30-SF |
HIGH POWER UNI / BI DIRECTIONAL COUPLER
| Freq.min. (MHz) |
Freq.max. (MHz) |
Coupling (dB) |
VSWR max. (Main line) | Directivity (dB) min. |
IL (dB max.) | Power max. (W CW max.) | Peak power (Kw) |
P/N |
|---|---|---|---|---|---|---|---|---|
| 1000 | 3000 | 20 | 1.15:1 | 20 | 0.3 | 160 |
CD-1-1000-3000-20-160-NF-NF-NF |
|
| 1000 | 4000 | 20 | 1.15:1 | 27 | 0.3 | 500 | 10 |
CD-1-1000-4000-20-500-NM-NF-NF |
| 1200 | 1400 | 40 | 1.20:1 | 20 | 0.2 | 600 | 6 |
CD-1-1200-1400-40-600-NF-NF-NF |
| 1200 | 1400 | 30 | 1.20:1 | 20 | 0.2 | 1000 | 10 |
CD-1-1200-1400-30-1000-NF-NF |
| 1200 | 1400 | 40 | 1.20:1 | 20 | 0.2 | 1000 | 10 |
CD-1-1200-1400-40-1000-NF |
| 1200 | 1400 | 50 | 1.20:1 | 20 | 0.2 | 1000 | 10 |
CD-1-1200-1400-50-1000-NF-SF |
| 6000 | 18000 | 25 | 1.40:1 | 20 (22 Typ.) | 0.3 | 200 | 2 |
CD-1-6000-18000-25-200-TF-TF-SF |
| 6000 | 18000 | 30 | 1.40:1 | 20 (22 Typ.) | 0.3 | 200 | 2 |
CD-6000-18000-30-200-TF-TF-SF |
| 6000 | 18000 | 30 | 1.50:1 | 20 | 0.3 | 200 | 2 |
CD-6000-18000-30-200-NM-NM-SF |
| 6000 | 18000 | 40 | 1.40:1 | 20 (22 Typ.) | 0.3 | 200 | 2 |
CD-6000-18000-40-200-TF-TF-SF |
| 6000 | 18000 | 40 | 1.40:1 | 20 (22 Typ.) | 0.3 | 200 | 2 |
CD-6000-18000-40-200-NM-NM-SF |
| 6000 | 18000 | 40 | 1.40:1 | 20 (22 Typ.) | 0.3 | 200 | 2.5 |
CD-6000-18000-40-200-NM-NM-SF |
| 8900 | 9900 | 20 | 1.50:1 | 12 | 0.5 | 75 | 0.75 |
CD-1-8900-9900-20-75-SF-SF-SF |
| 9000 | 10000 | 30 | 1.40:1 | 20 (22 Typ.) | 0.3 | 200 | 2 |
CD-1-9000-10000-30-200-TF-TF-SF |
| 15000 | 18000 | 30 | 1.40:1 | 20 (22 Typ.) | 0.3 | 200 | 2 |
CD-1-15000-18000-30-200-TF-TF-SF |
DUAL DIRECTIONAL COUPLER
| Freq. min. (MHZ) |
Freq. max. (MHz) |
Coupling (forward) (dB) |
Coupling (reverse) (dB) |
VSWR max. (Main Line) | Directivity min. (dB) |
IL (dB max.) | Power max. (W CW max.) | Peak power (Kw) |
P/N |
|---|---|---|---|---|---|---|---|---|---|
| 400 | 2000 | 40 | 40 | 1.3:1 | 18 | 0.2 | 200 |
CD-2-400-2000-40-40-200-NF-NF-NF |
|
| 700 | 4200 | 50 | 50 | 1.25 | 19 | 0.4 | 400 |
CD-2-700-4200-50-50-400-NF-NF-SF |
|
| 800 | 2500 | 30 | 30 | 1.4:1 | 20 | 0.2 | 500 | 10 |
CD-2-800-2500-30-30-500-716F-716F-SF |
| 800 | 4000 | 40 | 40 | 1.20:1 | 20 | 0.3 | 300 |
CD-2-800-4000-40-40-300-NF-NF-NF |
|
| 800 | 4000 | 50 | 50 | 1.20:1 | 20 | 0.3 | 300 |
CD-2-800-4000-50-50-300-NF-NF-NF |
|
| 2000 | 4000 | 30 | 30 | 1.4:1 | 20 | 0.2 | 500 | 10 | CD-2-1000-4000-30-30-500-716F-716F-SF |
| 1000 | 3000 | 20 | 20 | 1.15:1 | 20 (27 typ) | 0.3 | 300 | 10 |
CD-2-1000-3000-20-20-300-TF-TF-TF |
| 1000 | 3000 | 30 | 30 | 1.4:1 | 20 | 0.2 | 500 | 10 |
CD-2-1000-3000-30-30-716-716-SF |
| 1000 | 3000 | 30 | 30 | 1.4:1 | 18 | 1 | 1000 |
CD-2-1000-3000-30-30-1000-NM-NF-NF |
|
| 1000 | 4000 | 20 | 20 | 1.15:1 | 20 (27 typ) | 0.3 | 160 | 3 |
CD-2-1000-4000-20-20-160-NM-NF-NF |
| 1015 | 1045 | 40 | 40 | 1.3:1 | 18 | 0.2 | 480 | 6 |
CD-2-1015-1045-40-480-716-716-SF |
| 1200 | 1400 | 30 | 30 | 1.2:1 | 20 | 0.2 | 600 | 10 |
CD-2-1200-1400-30-30-600-NM-NF-NF |
| 1200 | 1400 | 50 | 50 | 1.2:1 | 25 | 0.15 | 1000 | 10 |
CD-2-1200-1400-50-50-1000-716F-716F-NF |
| 1700 | 2100 | 30 | 30 | 1.10:1 | 27 | 0.1 | 500 |
CD-2-1700-2100-30-30-500-NM-NF-SF |
|
| 1700 | 2100 | 50 | 40 | 1.20:1 | 20 | 0.3 | 2500 |
CD-2-1700-2100-50-40-2500-158-158-NF |
|
| 1000 | 4000 | 20 | 20 | 1.15:1 | 20 (27 typ) | 0.3 | 500 | 10 |
CD-2-1000-4000-20-20-500-NM-NF-NF |
| 2000 | 4000 | 30 | 30 | 1.4:1 | 20 | 0.2 | 500 | 10 |
CD-2-2000-4000-30-30-716-716-SF |
| 2000 | 8000 | 10 | 10 | 1.50:1 | 15 | 1 | 30 |
CD-2-2000-8000-10-10-30-SF-SF-SF |
|
| 6000 | 18000 | 40 | 40 | 1.50:1 | 12 | 0.5 | 200 | 2.5 |
CD-2-6000-18000-40-40-200-NM-NF-SF |
| 8000 | 12000 | 35 | 35 | 1.50:1 | 12 | 0.5 | 150 | 0.5 |
CD-2-8000-12000-35-35-150-TF-TF-SF |
| 15000 | 18000 | 40 | 30 | 1.50:1 | 20 | 0.5 | 120 | 0.4 |
CD-2-15000-18000-40-30-120-TF-SF |
| 15500 | 17500 | 40 | 30 | 1.50:1 | 20 | 0.5 | 120 | 0.4 |
CD-2-15500-17500-40-30-120-TF-TM-SF |
WAVEGUIDE DIRECTIONAL COUPLERS (UNI-BI-DUAL)
| Freq. min. (MHZ) |
Freq. max. (MHz) |
Coupling (forward) (dB) |
Coupling (reverse) (dB) |
VSWR max. (Main Line) | Directivity min. (dB) |
IL (dB max.) | Power max. (W CW) | Peak power (Kw) |
P/N |
|---|---|---|---|---|---|---|---|---|---|
| 3600 | 4200 | 30 | - | 1,10:1 | 20 | 0.1 | 5 000 | CD-1-3600-4200-30-5000-WR229 | |
| 5850 | 7000 | 50 | - | 1.10:1 | 20 | 0.1 | 5000 | CD-1-5850-7000-50-5000-WR137 | |
| 34500 | 35500 | 40 | 30 | 1,30:1 | 20 | 0.5 | 150 | 1.5 | CD-2-34500-35500-40-30-150-WR28 |
| 34500 | 35500 | 40 | 30 | 1,30:1 | 20 | 0.5 | 150 | 1.5 | CD-2-34500-35500-40-30-150-WR28-K |
