ENERGY CONVERSION EFFICIENCY IMPROVEMENT DEVICE

The present invention enables the energy conversion efficiency of installed equipment and the like to be further improved. An energy conversion efficiency improvement device includes: a first antenna which is formed by winding a conducting wire, the two ends of the conducing wire being connected to a direct-current power source; an LC circuit unit which is connected to the conducting wire constituting the first antenna and which includes at least one LC module obtained by connecting an inductance element and a capacitor element in series or in parallel; a joined material portion obtained by joining at least two different types of materials together; and a horn component which comprises a conductor, is formed with line symmetry across a central axis, and is formed with a shape having an external diameter that increases in one direction along the central axis.