2.5Gcpsスペクトル拡散変調を用いた26GHz 帯自動車用短距離UWBレーダ

摘要

A 26GHz short-range radar system has been developed based on a 2.5Gcps direct sequence spread spectrum technique combined with simple homodyne detection. Separate frequency-triplers have been provided with transmitter (TX) and receiver (RX) chips to cut off the carrier leakage path from local signal. By using this configuration, carrier-leakage in TX signal can be significantly suppressed falling into the satisfactory range of the UWB regulation. The present radar system achieved the maximum detection range of 14m with the resolution of 6cm. TX, RX, and PN generator chipset has been developed using InGaP/GaAs HBT process, where fT/fmax of 65GHz/83GHz were attained.%26GHz帯超高帯域無線（UWB）を用いた車載用近距離レーダの無線部およびマイクロ波モノリシック集積回路（MMIC）の試作評価を行った.MMICは送信,受信の2チップで構成し，送受間を送信周波数の1／3の周波数で搬送波を伝送するように構成することで，ホモダイン方式によるシンプルな構成を採用しつつキャリアリークのない広帯域変調を実現，試作チップをレーダ装置として構成し，動作を確認した.