Bent Digital Phase Shifter Layout for Compact Phase Adjustment
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Solution Overview
Problem
The addition of a phase shifting function to the connection portion of a digital phase shifter increases the size of the connection portion, which is undesirable.
Innovation Solution
A digital phase shifter design that includes a plurality of digital phase shift circuit groups connected in cascade with bend type connection portions, utilizing a first connection circuit with a coil in series and capacitors in parallel, and electronic switches to adjust phase shift while minimizing size increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a phase shifting function is added to the connection portion by adding digital phase shift circuits, then the phase shifting capability is improved, but the size of the connection portion increases
Solution Approach 1:
The patent combines the connection function and phase shifting function into a single integrated connection portion. The digital phase shift circuits are merged with the connection portion structure, allowing the connection portion to simultaneously perform both signal connection and phase shifting operations, thereby avoiding the need for separate phase shifting components that would increase overall size.
Solution Approach 2:
The connection portion is designed to serve multiple functions: it acts as both a connection element and a phase shifting element. By making the connection portion universal (performing both connection and phase shifting), the patent eliminates the need for additional dedicated phase shifting components, thus preventing size increase while maintaining phase shifting capability.
2Measurement precision
If digital phase shift circuits are connected in cascade to achieve desired phase shifting, then the phase shifting precision is improved, but the length of the digital phase shifter increases
Solution Approach 1:
The patent transitions from a one-dimensional linear cascade connection to a two-dimensional bent configuration. By using bend type connection portions, the signal path can be folded back on itself, allowing multiple digital phase shift circuits to be connected in cascade vertically or in a compact pattern rather than extending linearly, thus achieving high phase shifting precision without proportionally increasing the overall length.
Solution Approach 2:
The bent type connection portions allow the signal path to be nested or folded within a compact space. Multiple connection segments are arranged in a nested or folded configuration, enabling the cascade connection of numerous digital phase shift circuits to fit within a shorter overall length by utilizing spatial folding rather than linear extension.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design allows for the addition of a phase shifting function to the connection portion while suppressing an increase in size, enabling efficient phase shift adjustments.
Implementation Method 1
the first connection circuit includes a first coil that is connected in series between the signal line of the first digital phase shift circuit and the signal line of the second digital phase shift circuit, a pair of first capacitors that are connected in parallel on both sides of the first coil
Implementation Method 2
a pair of second electronic switches that are each provided on one end side of the pair of first capacitors and that switch whether or not to ground the one end side of the pair of first capacitors
Data Source
AI summary
A digital phase shifter includes a plurality of digital phase shift circuit groups in which a plurality of digital phase shift circuits are connected in cascade, and one or more bend type connection portions that connect two of the digital phase shift circuit groups to each other, in which a connection portion includes a coil that is connected in series between a signal line of a first digital phase shift circuit and a signal line of a second digital phase shift circuit, of two of the digital phase shift circuits, a pair of capacitors that are connected in parallel on both sides of the coil, and a pair of electronic switches that are each provided on one end side of the pair of capacitors and that switch whether or not to ground the one end side of the pair of capacitors.