Radio wave measurement device

A radio wave measurement device, comprising:

• a transmission antenna;
• a reception antenna;
• a main circuit configured to output a transmission signal to the transmission antenna and measure a strength of a reception signal received with the reception antenna;
• a connection circuit disposed between the main circuit and the reception antenna, and configured to reduce flowing of the transmission signal into the reception antenna;
• at least one isolator disposed between the connection circuit and the reception antenna, and configured to reduce flowing of the transmission signal into the reception antenna;
• a coupler disposed between the reception antenna and the at least one isolator, the coupler being configured to distribute the reception signal to the main circuit and an external signal-waveform measurement device;
• and
• a housing having a hexahedron shape and configured with six rectangular antenna-arrangement surfaces, each of the six rectangular antenna-arrangement surfaces facing a corresponding one of the six rectangular antenna-arrangement surfaces,
• wherein the transmission antenna and the reception antenna constitute a pair disposed on each of the six rectangular antenna-arrangement surfaces.