Abstract: A multilayer ceramic capacitor includes a body including a dielectric layer and first and second internal electrodes disposed with the dielectric layer interposed therebetween; first and second connection electrodes penetrating the body in a direction perpendicular to the dielectric layer and connected to the first internal electrode; third and fourth connection electrodes penetrating the body in a in a direction perpendicular to the dielectric layer and connected to the second internal electrode; first and second external electrodes disposed on both surfaces of the body, and connected to the first and second connection electrodes; and third and fourth external electrodes connected to the third and fourth connection electrodes, and at least a portion of the first and second connection electrodes is exposed to the surface of the body.

Abstract: Disclosed is a waveguide adapter able to generate a circularly polarized wave. The waveguide adapter to be coupled with a horn antenna realizes a polarized wave conversion function for converting a linearly polarized wave signal into a circularly polarized wave signal, or vice versa, and an adapter function for converting a waveguide signal into an external transmission line signal, resulting in a simplified configuration and small size of a communication system using a circularly polarized wave signal. The waveguide adaptor includes a probe to transmit a linearly polarized wave signal from an external transmission line to a waveguide transmission line, a polarized wave conversion line reflector located in the rear of the probe to convert a vertically polarized wave into a horizontally polarized wave, and a back-short member to forwardly transmit a rearward signal. The waveguide adapter is applicable to communication systems using circularly polarized wave signals.

Abstract: Disclosed is a waveguide adapter able to generate a circularly polarized wave. The waveguide adapter to be coupled with a horn antenna realizes a polarized wave conversion function for converting a linearly polarized wave signal into a circularly polarized wave signal, or vice versa, and an adapter function for converting a waveguide signal into an external transmission line signal, resulting in a simplified configuration and small size of a communication system using a circularly polarized wave signal. The waveguide adaptor includes a probe to transmit a linearly polarized wave signal from an external transmission line to a waveguide transmission line, a polarized wave conversion line reflector located in the rear of the probe to convert a vertically polarized wave into a horizontally polarized wave, and a back-short member to forwardly transmit a rearward signal. The waveguide adapter is applicable to communication systems using circularly polarized wave signals.