公开(公告)号：US3909755A

公开(公告)日：1975-09-30

申请号：US48986974

申请日：1974-07-18

Applicant: US ARMY

Inventor： KAUNZINGER HELMUTH M

IPC: H01P1/201 ,  H01P1/211 ,  H01P1/20 ,  H01P3/06 ,  H01P3/08

CPC classification number: H01P1/211 ,  H01P1/201

Abstract: A low pass microwave filter comprised of a two conductor transmission line including at least two cascaded tapered sections wherein one of the conductors in each filter section has a tapered surface, preferably linear, and having an electrical length substantially equal to one half the wavelength of the center frequency of operation. Geometrically and performance-wise the subject filter is unsymmetrical with respect to its input and output ports. The filter does not exhibit the usual rapid transition between the pass band and stop band which is a general characteristic of conventional low pass microwave filters utilizing reflective harmonic structures.

Abstract translation: 一种低通微波滤波器，由包括至少两个级联锥形部分的双导体传输线组成，其中每个滤波器部分中的一个导体具有锥形表面，优选是线性的，并且具有基本上等于 中心运行频率。 在几何和性能方面，目标滤波器相对于其输入和输出端口是不对称的。 滤波器在通带和阻带之间不会出现通常的快速转变，这是常规的利用反射谐波结构的低通微波滤波器的一般特征。

公开(公告)号：US3874616A

公开(公告)日：1975-04-01

申请号：US37602873

申请日：1973-07-02

Applicant: US ARMY

Inventor： BUSER RUDOLF G ,  KAUNZINGER HELMUTH M

IPC: B64D45/02 ,  B64D47/00

CPC classification number: B64D45/02

Abstract: This disclosure relates to electrostatic field strength and particularly to a device for detecting and indicating the strength of an electrostatic field in the vicinity of an aircraft. More particularly, this invention relates to a device for detecting and indicating the field strength in the vicinity of a helicopter or other device having rotating blades large enough physically to substantially alter the field strength pattern about the aircraft. In this device, the cyclically changing pattern of field strength caused by the rotation of the blades is sensed by a field probe to produce an alternating voltage that is applied to an amplifier and indicator that may be synchronized with the rotation of the blades, for noise component reduction.

Abstract translation: 本公开涉及静电场强度，特别涉及用于检测和指示飞行器附近的静电场强度的装置。 更具体地说，本发明涉及一种用于检测和指示具有足够物理的旋转叶片的直升机或其他装置附近的场强的装置，以基本上改变围绕飞机的场强图案。 在该装置中，由场探针感测到由叶片的旋转引起的周期性变化的场强模式，以产生施加到可与叶片的旋转同步的放大器和指示器的交流电压，用于噪声 组件减少。