Planar Near-Field Measurements of Low-Sidelobe Antennas.

The planar near-field measurement technique is a proven technology for measuring ordinary antennas operating in the microwave region. The development of very low-sidelobe antennas raises the question whether this technique can be used to accurately measure these antennas. We show that data taken with an open-end waveguide probe and processed with the planar near-field methodology, including probe correction, can be used to accurately measure the sidelobes of very low-sidelobe antennas to levels of -55 dB to -60 dB relative to the main beam peak.

[Suitability of various food mixtures for breeding and rearing of beagle dogs. 3. Methods and results for the Ingelheim team].

Two different modes of nutrition during breeding and rearing of dogs are investigated to determine which of them has the better effect. The use of a complete feed for breeding and maintenance (Altromin H) was compared with the use of a special breeding feed (Zahn Z), respectively, together with a special maintenance feed (Zahn H). A palatability test was made, a 2-year test for the effect on breeding, observation of weight gain and food consumption in the rearing phase on all the dogs of the strain Chbi:BEAGLE.

[Study on different kinds of animal feed for their adequateness for breeding and rearing beagle dogs. 1st communication: summarizing presentation of results (author's transl)].

Some of the current food mixtures for dogs available on the market and their further development were tested regarding the usage under rational and standardized experimental conditions. Further, it should be clarified which of the two separate modes of nutrition has the better effect on breeding and rearing of dogs. The use of a complete feed for breeding and maintaining (Altromin H) was compared with a special breeding feed (Zahn Z) together with a special maintenance feed (Zahn H).