Distributed antenna system

One type of open antenna system is based on a microwave tunnel. The final piece can be put on a conveyor belt through a tunnel with an array of magnetrons. Depending on the speed of the conveyor belt, the radiation time will vary. In this case the microwave source is fixed, while the irradiated piece is mobile. Conversely, a robot assembled with a magnetron can irradiate a fixed piece through a designed movement. This system allows a homogeneous microwave distribution also for complex shapes, and it is possible to focus the microwave radiation in specific zones of the piece for a controlled duration. 

Fig. 3. A Comparison of Chl/BChl arrangements in LHl-RC complex (orange), PSI (blue) and PSII (red). Antenna systems are represented by the central Mg atoms of their Chls/BChls, aligned at the RC primary donor RC pigments have stick representation. Bacterial, PSI and PSII RCs are colored cyan, green, and pink, respectively. Images were created with VMD. B Polar plot representing distance and radial distributions from the middle of the central pair of RC (B)Chls. LHC and RC components are marked by full and open symbols, respectively. The pigments of PSI, PSII, and bacterial RCs are encircled by blue, red, and orange ellipses, respectively the calculated cordons sanitaire for PSII and bacterial LHl-RC are represented by red and orange areas, respectively.

The GPR system consists of five major components, these include 1) power distribution unit 2) radar control unit 3) antenna transceiver 4) graphic recorder and 5) tape recorder. The power distribution unit provides proper AC/DC voltages to all the GPR equipment. The radar control unit triggers the antennae transceiver to... 

Figure 13.20 shows several practical aperture antennas. Figure 13.20(a) to Figure 13.20(d) pertain to horn types, whereas Fig. 13.20(e) is the paraboloidal antenna, which is popular with satellite television receiving systems for home use. Shown in Fig. 13.20(a) to Fig. 13.20(c) is a TEio electric field distribution. The terminology TEio implies a transverse electric field, as shown, with one-half of a cosine variation in one direction and no variation in the other direction, hence the subscript 10. In Fig. 13.20(a), it is called a... 

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