Principle of Lens Antenna Technology
1.Lens Antenna Technology:
Distinguishing beams in active antenna systems requires subtracting the signals of neighboring beams from the original signal. In order to reduce the BER, a large number of auxiliary symbols are added to the empty port, which means that the amount of information per symbol decreases. However, enhancing the physical isolation between neighboring beams significantly reduces computational requirements. If this isolation reaches a sufficient level, coherent operations and auxiliary symbol transmission become unnecessary, thus enhancing the information capacity per symbol. For years, smart antennas have pursued ultra-narrow beam-forming technology, leveraging lens antenna technology as its core application.
2.Lens Antenna Application Analysis:
Lens antennas achieve exceptional isolation of over 25dB, enabling adjacent beam multiplexing. By employing RB multiplexing with beam separation, the horizontal capacity can be effortlessly multiplied by 6-fold (8 beams). If both horizontal and vertical planes adopt an 8x8 configuration, the capacity can be multiplied by 36 with ease. Taking into account user distribution, this provides at least a 30-fold increase in capacity.
3.Advantages of Electromagnetic Lens Antenna Technology:
- High Gain with Few Radiators:
Achieves high gain with just a small number of radiators, reaching up to 30dBi.
- Superior Side-lobe Suppression:
Horizontal side-lobe suppression can reach 20dB, outperforming phased arrays by over 10dB in terms of reducing interference to side-lobe or secondary side-lobes.
- Advantages in Beam Isolation:
Beams are formed on hardware, ensuring superior isolation between beams (over 30dB), minimal beam coupling, and reduced beam coherence.
- Reduced Data Volume and Power Consumption:
Eliminates the need for beam-forming, thereby decreasing computational data during beam-forming and lowering power consumption.
- Independent Electrical Adjustment:
Leveraging Sigtenna technology, lens antennas enable independent electrical beam adjustment, allowing for tailored beam coverage adjustments based on varying user distributions and application scenarios.
IPV4 / IPV6