Frequency-Dependent Power Divider for Satellite Antenna Gain
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power dividers used in satellite communication antennas often result in reduced performance when shared between transmitting and receiving frequency bands due to inhomogeneous power distribution, leading to suboptimal aperture illumination and antenna gain.
Innovation Solution
A power divider design with frequency-dependent power division, featuring a signal conductor with one input and two outputs of differing impedances, combined with a septum offset from the center line, allowing for asymmetrical power distribution in the transmitting band while maintaining symmetry in the receiving band, enabling higher illumination in the transmitting band compared to the receiving band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a shared power divider network is used for both transmitting and receiving frequency bands, then device complexity is reduced, but antenna gain and performance capability deteriorate due to inhomogeneous power distribution
Solution Approach 1:
The power divider network dynamically changes its power distribution characteristics based on frequency. In the receiving band, it provides homogeneous power distribution (symmetrical), while in the transmitting band, it provides inhomogeneous power distribution (asymmetrical). This frequency-dependent behavior allows a single static structure to adapt to different operational requirements, resolving the contradiction between device complexity and antenna gain.
Solution Approach 2:
The patent changes the impedance parameters of the power divider outputs to achieve frequency-dependent power distribution. By designing outputs with different impedances (first output with impedance Z1, second output with impedance Z2 where Z1 ≠ Z2), the network naturally produces different power division ratios at different frequencies, enabling homogeneous illumination in receiving band and controlled inhomogeneous illumination in transmitting band without requiring separate networks.
2Illumination intensity
If an asymmetrical power distribution is used in the transmitting frequency band, then aperture illumination is optimized for transmission, but performance capability in the receiving band deteriorates
Solution Approach 1:
The power divider exhibits dynamic power distribution characteristics that automatically switch between symmetrical and asymmetrical modes based on the operating frequency band. This allows the system to achieve optimized aperture illumination in the transmitting band while maintaining homogeneous power distribution for optimal receiving performance, eliminating the need to choose between the two conflicting requirements.
Solution Approach 2:
The patent introduces controlled asymmetry through unequal output impedances and a septum element offset from the center line. This asymmetry is frequency-dependent: at receiving frequencies, the asymmetrical structure still produces homogeneous power distribution, while at transmitting frequencies, it produces the desired inhomogeneous power distribution for optimized aperture illumination, thus resolving the contradiction between transmission and receiving performance.
3Ease of operation
If a septum is introduced to achieve frequency-dependent power division, then power distribution control is improved, but device complexity increases
Solution Approach 1:
The septum acts as an intermediary element that mediates the power distribution between the two outputs. By positioning the septum offset from the center line and designing it with specific dimensions, it creates the frequency-dependent coupling effects needed to achieve different power division ratios at different frequencies. This single intermediary element provides sophisticated power distribution control without requiring complex multi-component structures.
Solution Approach 2:
The septum introduces localized asymmetry at a specific position within the power divider structure. Rather than making the entire structure complex, only a local region contains the septum element with specific geometric properties. This localized modification is sufficient to create the desired frequency-dependent power distribution characteristics, achieving ease of operation with minimal increase in overall device complexity.
Data Source
AI summary
A power divider may include a signal conductor. The signal conductor may include an input, a first conductor section with a first width and a first output, and a second conductor section with a second width and a second output. The first and second widths may be different. The signal conductor may also include a septum. The septum may extend into the signal conductor from a side of the signal conductor opposite the input.