Distinctives
- Broadband
- Frequency coverage 50-300 GHz
- Lowest insertion loss
- Full band test data
- Direct engineering support
Applications
- Transmit/receive systems
- 6G communication systems
- Radiometers
- Satellite data transmission
- Satellite television broadcasting
- Military radar systems
- Telecommunication
- Monostatic radar
The hybrid circulator comprises a Faraday rotator and an orthomode transducer (OMT). Since both the Faraday rotator and OMT are inherently broadband, the hybrid circulator is also broadband.
Measured RF test data for the full band WR-6.5 hybrid circulator are shown in the graph below. Isolation is greater than 20 dB. Return loss is greater than 15 dB. Insertion loss is less than 1.5 dB across most of the band. This level of performance has never been achieved before in a D-band circulator.
The patented hybrid circulator technology is only available from Micro Harmonics. Please contact us for more information.
High Isolation Hybrid Circulators
In high-power transceiver systems, the sensitive receiver (Rx) must be isolated from the high-power transmitter (Tx) signal. The 20 dB isolation provided by Y-junction circulators is insufficient. Circulators employing multiple Y-junctions can achieve some increased isolation parameters, but the isolation of the receiver from the transmitter signal cannot be increased by using multiple junctions.
To understand why, consider the schematic for a triple junction circulator. The three circulators are designated “A”, “B”, and “C”. Circulators “A” and “C” function as isolators since their third ports are terminated with matched loads. A single isolation path on circulator “B”, |S31|, blocks the transmit signal from reaching the receiver. Regardless of how many junctions are used, a multi-
Y-junction circulator can only have a single isolation path protecting the receiver (Rx) from the transmitter (Tx).
But Micro Harmonics’ unique hybrid circulators can be designed to achieve high S31 isolation over broad bandwidths. HFSS simulation data are shown below for a hybrid circulator with S31 isolation of more than 40 dB over the band 157–162 GHz. Measured data from a Y-junction are shown for comparison. High isolation hybrid circulators can be designed up to 330 GHz.
