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An ultrawideband K-/Ka-band lens antenna for future satellite communication systems is presented. It consists of an extended hemispherical dielectric lens that is fed by a square substrate-integrated waveguide (SIW) and therefore offers a low-cost alternative to horn antennas. The design procedure is explained, and the antenna performance is presented. A sophisticated test fixture is developed to...
An active 30 GHz transmit antenna array featuring digital beam forming and polarization multiplexing is presented. A fully equipped scalable module with 16 antenna elements is realized and tested. The active components and additional functional elements such as a temperature monitoring system are characterized. The radiation pattern is thoroughly assessed. The impact of mutual coupling is analyzed...
A K-band patch antenna with reconfigurable frequency and polarization properties is proposed. It can be operated in two distinct frequency bands around 20GHz and can be switched between left and right hand circular polarization. The operating mode is changed by means of pin diodes. The geometry and the radiation behavior are optimized for array applications. The antenna relies on a standard printed...
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