© The Institution of Electrical Engineers
The Letter presents a wideband and low-loss transition from conductor-backed coplanar waveguide to a modified, conductor-backed coplanar strip transmission line. The measured insertion loss is less than 1 dB up to 4.8 GHz and the return loss is greater than 12 dB. To reduce undesired modes two dielectric layers are used between the circuit and the conductor backing.
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http://iet.metastore.ingenta.com/content/journals/10.1049/el_19931370
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