Wave transmission lines and networks – Attenuators
Patent
1980-06-05
1982-05-18
Gensler, Paul L.
Wave transmission lines and networks
Attenuators
333246, H01P 122
Patent
active
043307655
ABSTRACT:
A programmable microwave card-type step attenuator is compensated for switch capacitance to render its attenuation response effectively insensitive to frequency over most of its dB range and comprises a plurality of cascaded attenuator sections disposed on a microstrip card with each attenuator section including a deposited film microstrip resistive network adapted to be switched into or out of the signal line by a miniature relay switch, a minimum loss transmission line being inserted into the signal line when the resistive network is switched out. Each of the microstrip resistive networks includes a reactive element connected thereto to compensate the frequency response of the resistive networks due to deviations from the optimum electrical length, thereby minimizing the frequency sensitivity of the attenuation characteristic of the section. Inductive effects are achieved by use of suitably shaped conductive areas or by removal of portions of the resistive networks. Capacitive effects are achieved by use of capacitances integrally formed with the resistive network. In addition, a window opening arrangement is provided which enables the required electrical connections of the attenuator circuit to be achieved with minimal length conductors. Compensation at the low levels of attenuation, i.e., 1 dB, 2 dB and perhaps 4 dB, cannot be effectively compensated by the aforesaid method alone and the attenuator may further comprise resistance stubs added to the minimum loss line to provide an additional increase in loss with frequency that parallels the attenuation sensitivity with frequency of the uncompensated lower dB attenuator networks.
REFERENCES:
patent: 2823358 (1958-02-01), Means et al.
patent: 3014187 (1961-12-01), Sher et al.
patent: 3449697 (1969-06-01), Mison
patent: 3626352 (1971-12-01), McCoig
patent: 4138637 (1979-02-01), Weinert
Gensler Paul L.
Rose Howard L.
Weinschel Engineering Co., Inc.
LandOfFree
Switchable microwave step attenuator with compensation for linea does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Switchable microwave step attenuator with compensation for linea, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switchable microwave step attenuator with compensation for linea will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-488517