مشروع البحث: I nvestigation and enhancement of phase shift of 90 hybrid
| dc.contributor.advisor | د.البشير محمد القمودى | |
| dc.date.accessioned | 2026-10-18T09:07:47Z | |
| dc.date.available | 2026-10-18T09:07:47Z | |
| dc.description | The 90° hybrid coupler is a four-port microwave device which takes an input on one port and provides an even power split on two output ports with a 90 degree phase shift between them. The fourth port on the device is isolated from the first port. The 90 degree hybrid coupler also known as quadrature hybrids or simply quad hybrids ,This device exhibits reciprocal behavior because any port can act as an input, and the device will operate in the same manner . Common uses of quadrature couplers include:- Antenna feed systems, the combination of power division/combining and 90º phase shift can simplify the feed network of phased array antenna systems, compared to alternative networks using delay lines. A coupler can be categorized by five main parameters:- bandwidth, insertion loss, coupling ratio, phase shift between ports, and isolation. | |
| dc.description.abstract | Couplers and hybrids are devices in which two transmission lines pass close enough to each other for energy propagating on one line to couple to the other line. A 3dB 90° or 180° hybrid splits an input signal into two equal amplitude outputs. A directional coupler normally splits an input signal into two unequal amplitude outputs. 90° Hybrids or hybrid couplers are basically 3 dB directional couplers in which the phase of the coupled output signal and the output signal are 90° apart. Since -3 dB represents half power, a 3 dB coupler divides the power equally (within a certain tolerance) between the output and coupled output ports. The 90° phase difference between the outputs makes hybrids useful in the design of electronically variable attenuators, microwave mixers, modulators and many other microwave components and systems. | |
| dc.identifier | 6064 | |
| dc.identifier.uri | https://dspace.academy.edu.ly/handle/123456789/2655 | |
| dc.subject | Investigation and Enhancement | |
| dc.title | I nvestigation and enhancement of phase shift of 90 hybrid | |
| dspace.entity.type | Project | |
| project.endDate | 2014 | |
| project.funder.name | الهندسة الكهربائية والحاسوب | |
| project.investigator | الزهراء سعيد منصور | |
| project.startDate | 2014 |