图：Interview "In Justice to the Crystal Detector" · Public domain · Wikimedia Commons

格林利夫·惠蒂尔·皮卡德1877—1956

Greenleaf Whittier Pickard

American radio pioneer (1877–1956)

IEEE 荣誉奖章 1926

Greenleaf Whittier Pickard was an American electrical engineer and inventor. He was largely responsible and most famous for the development of the crystal detector, the earliest type of diode detector, although he was not the earliest discoverer of the rectifying properties of contact between certain solid materials. The crystal detector was the central component in many early radio receivers from around 1906 until about 1920. Pickard also experimented with antennas, radio wave propagation and noise suppression.

摘自英文维基百科「Greenleaf Whittier Pickard」（英文维基百科，暂无中文条目），CC BY-SA 4.0

英文维基百科 Wikidata

出生: 1877 年 2 月 14 日，波特兰
逝世: 1956 年 1 月 8 日，牛顿
国籍: 美国
学科: 物理学、工程与发明、博物与综合
职业: 发明家、物理学家
母校: 哈佛大学

研究领域

技术

所获奖项（1）

1926IEEE 荣誉奖章

学会与院士

美国文理科学院

百科正文

本条目暂无中文维基百科条目，下面是英文维基百科原文。

On August 30, 1906, he filed a patent for a silicon crystal detector, which was granted on November 20, 1906.

On June 10, 1907, he filed a patent for a "Magnetic Aerial" (a loop aerial) which was granted on January 21, 1908. Pickard's loop antenna had directional properties that could be used to reduce interference to the intended wireless communications.

On June 21, 1911, he filed a patent on a crystal detector incorporating a springy low inertia wire of about 24-gauge formed with a loop or helix and pointed to make contact with the crystal. Crystal detectors incorporating this construction would become the most widely used and popularly known by the term cat whisker detector. This patent was granted on July 21, 1914.