https://www.pasternack.jp/wr-42-%e5%b0%8e%e6%b3%a2%e7%ae%a1-gunn-%e7%99%ba%e6%8c%af%e5%99%a8-category.aspx weekly 0.7 https://www.pasternack.jp/waveguide-gunn-oscillator-24.125-ghz-tuning-range-1000-mhz-pewgn1001-p.aspxdaily0.9