Codesign of Electrically Short Antenna–Electronics Interfaces in the Receiving Mode

The aim of this brief is to point out the importance of codesigning electrically short antenna-electronics interfaces as a way to improve the system performance. This can be achieved if both the antenna and electronic circuit designer have a common optimization target. In this brief, the codesign principles are presented for antenna systems in the receiving mode, which includes reception of wireless information and wireless power. A general interface analysis is carried out, suggesting that the choice of interface impedance plays a crucial role in the optimization procedure and depends on the preferred signal quantity of the electronic circuit. This allows to effectively improve design criteria such as noise figure, power efficiency and sensitivity without increasing the power consumption. Finally, two examples are treated to demonstrate the antenna-electronics codesign for the reception of wireless information (low-noise amplifier) and wireless power (radio-frequency energy harvesting).