| Image | Part Number | Description / PDF | Quantity | Rfq |
|---|---|---|---|---|
 |
Knowles DLI |
COUPLER |
20 |
|
 |
Knowles DLI |
RF DIR COUPLER |
77 |
|
 |
Knowles DLI |
RF DIR COUPLER 12GHZ-18GHZ SMD |
171 |
|
 |
Knowles DLI |
RF DIR COUPLER 6GHZ-18GHZ SMD |
0 |
|
 |
Knowles DLI |
RF DIR COUPLER 8GHZ-12GHZ SMD |
0 |
|
 |
Knowles DLI |
RF DIR COUPLER 6GHZ-18GHZ SMD |
35 |
|
 |
Knowles DLI |
COUPLER |
10 |
|
 |
Knowles DLI |
RF DIR COUPLER 4GHZ-8GHZ SMD |
304 |
|
 |
Knowles DLI |
RF DIR COUPLER 20GHZ-40GHZ SMD |
164 |
|
 |
Knowles DLI |
RF DIR COUPLER 20GHZ-40GHZ SMD |
149 |
|
 |
Knowles DLI |
DC TO 40GHZ 30DB RESISTIVE COUPL |
105 |
|
 |
Knowles DLI |
4 TO 8GHZ 10DB DIRECTIONAL COUPL |
11 |
|
 |
Knowles DLI |
RF DIR COUPLER 12GHZ-18GHZ SMD |
65 |
|
 |
Knowles DLI |
COUPLER |
0 |
|
 |
Knowles DLI |
RF DIR COUPLER 4GHZ-8GHZ SMD |
15 |
|
 |
Knowles DLI |
RF DIR COUPLER 24GHZ-33GHZ SMD |
55 |
|
 |
Knowles DLI |
RF DIR COUPLER 8GHZ-12GHZ SMD |
172 |
|
 |
Knowles DLI |
RF DIR COUPLER 40GHZ SMD |
94 |
|
 |
Knowles DLI |
COUPLER |
10 |
|
|
Knowles DLI |
COUPLER |
30 |
|
Directional couplers are passive devices that sample a portion of RF/IF signal power for monitoring or feedback purposes. They enable signal splitting, reflection measurement, and signal-to-noise ratio optimization. These components are critical in wireless communication systems, RFID infrastructure, and industrial control applications.
| Type | Functional Features | Application Examples |
|---|---|---|
| Microwave Ridge Waveguide | High power handling (100W+), broadband operation | 5G Base stations, Satellite communication |
| Coaxial Line | Compact design, 50/75 impedance options | RFID readers, Test equipment |
| Microstrip Planar | Low profile, Surface-mount compatible | WLAN routers, IoT modules |
| Hybrid Coupler | 3dB power split with phase matching | MIMO systems, Beamforming networks |
Typical construction includes: - Precision-machined metal housing (aluminum/copper alloys) - Dielectric substrates (PTFE or ceramic materials) - Coupling slots/apertures (0.1-2.0mm dimensions) - Input/Output ports with SMA/N-Type connectors - Isolation termination resistor (50 matched load) - EMI shielding gaskets
| Parameter | Typical Range | Importance |
|---|---|---|
| Coupling Factor | 3-40 dB | Determines sampled power level |
| Directivity | 15-40 dB | Measures forward/reverse signal separation |
| Insertion Loss | 0.1-2.0 dB | Impacts system power efficiency |
| VSWR | 1.1:1 - 1.5:1 | Affects impedance matching quality |
| Frequency Range | 30 MHz - 110 GHz | Defines operational bandwidth |
Key industries include: - Telecommunications (5G/4G BTS signal monitoring) - RFID systems (UHF/NFC reader sensitivity control) - Industrial IoT (Wireless sensor network optimization) - Medical equipment (MRI RF power management) - Automotive (V2X communication diagnostics)
| Manufacturer | Representative Product | Key Features |
|---|---|---|
| Analog Devices | ADL5523 | 40GHz broadband, 20dB coupling accuracy |
| Mini-Circuits | ZFDC-20-63-S+ | DC-20GHz, 3.5mm connectorized |
| TE Connectivity | RF-0424-01 | Automotive-grade RFID coupler |
| KRYTAR | 10104800 | 10-48GHz, 50dB dynamic range |
Key considerations: - Frequency bandwidth match (1.5x operating range) - Power handling (1.2x maximum system power) - Directivity requirements (>30dB for precise measurements) - Environmental factors (operating temperature -40 C to +85 C) - Connector type compatibility (SMA vs N-Type) - Cost vs performance tradeoff (planar vs waveguide)
Emerging developments: - Sub-6GHz massive MIMO integration - Advanced packaging for mmWave applications - AI-optimized coupling algorithms - Gallium Nitride (GaN) material adoption - Miniaturization for mobile device integration - Higher directivity (>50dB) research