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The paper presents recent developments in designing quasi-optical multipliers in the sub-THz frequency domain. An extensive measurement campaign is described in detail in which issues are addressed concerning the non-trivial nature of the problems met. In particular, attention is paid to impedance measurements of the core element, the integrated antenna-multiplier (dubbed the ‘multenna’), together...
This paper describes how two radiating elements designed for two different resonating frequencies can be coupled to properly radiate a higher harmonic frequency. The placement of the higher frequency resonating element is chosen by considering the electric filed distribution in the lower frequency antenna. This combination establishes enhanced radiation efficiency at 300 GHz (i.e. the third harmonic...
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