Concealed holographic coding for security applications by using a moiré technique

On the design of multifrequency dividers

On the design of multifrequency dividers suitable for GSMsol;DCS/PCS/UMTS applications by using a particle swarm optimization-based technique

✍ Zaharias D. Zaharis; Dimitra G. Kampitaki; Pavlos I. Lazaridis; Anastasia I. Pap 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 316 KB

## Abstract A particle swarm optimization‐based technique is applied to design dividers that operate in two or more frequency bands at once. The geometry of the dividers is optimized under specific requirements concerning the impedance‐matching bandwidth and the complex current distribution on unma