Near-closed polygonal chain microstrip antenna for 60 GHz
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The fabrication of spiral antennas at millimeter-wave frequencies is challenging due to inconsistent fabrication tolerances and design rules for trace width and spacing, which complicates the implementation of Archimedean spiral antennas and other designs requiring finer features.
Innovation Solution
A near-closed polygonal chain microstrip antenna design with a radiating element formed by a continuous conductive trace of linear segments, avoiding proximate parallel segments to reduce mutual interference, allowing for conventional fabrication and integration into IC packages for 60 GHz RF applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If Archimedean spiral antennas are used for broadband CP applications, then frequency independence and large bandwidth are achieved, but fabrication tolerances and design rules become inconsistent at millimeter-wave frequencies
Solution Approach 1:
The continuous spiral trace is segmented into discrete linear segments arranged in a polygonal chain configuration. This segmentation allows each segment to be manufactured with standard tolerances while maintaining the overall broadband performance through the geometric arrangement of segments rather than relying on continuous curved traces with tight tolerance requirements.
Solution Approach 2:
Instead of using the conventional Archimedean spiral design with continuously varying trace width and spacing, the patent inverts the approach by using linear segments of constant width arranged in a polygonal chain. This inversion simplifies the design rules and makes fabrication tolerances consistent while preserving the broadband characteristics through the near-closed polygonal geometry.
2Measurement precision
If finer traces are used to implement spiral antennas at millimeter-wave frequencies, then frequency independence is maintained, but fabrication tolerances become inconsistent and design rules complicate
Solution Approach 1:
The patent changes the geometric parameters from continuous spiral dimensions (varying trace width and spacing) to discrete linear segment parameters (constant width, defined lengths and angles). This parameter change allows the use of larger, more manufacturable feature sizes while maintaining frequency independence through the near-closed polygonal chain geometry that preserves the broadband resonant characteristics.
3Ease of manufacture
If proximate parallel linear segments are used in the radiating element, then fabrication is simplified, but mutual interference increases
Solution Approach 1:
The patent uses an asymmetric near-closed polygonal chain arrangement where linear segments are positioned at specific angles and distances from each other. This asymmetric geometry avoids parallel segment alignment, eliminating mutual interference while maintaining fabrication simplicity through the use of straight linear segments with standard manufacturing tolerances.
Data Source
AI summary
A microstrip antenna includes a substrate having a first surface and an opposing second surface, a ground plane disposed at the first surface of the dielectric layer, and a conductive layer disposed at the second surface of the substrate. The conductive layer includes a continuous conductive trace comprising a plurality of linear segments arranged in a near-closed polygonal chain. The near-closed polygonal chain can define a truncated square spiral shape. Alternatively, the near-closed polygonal chain can define one of a near-closed pentagonal shape, a near-closed hexagonal shape, a near-closed heptagonal shape, and a near-closed octagonal shape. The antenna can be operated to communicate electromagnetic signaling responsive to current signaling provided by the transceiver circuitry, either by driving electrical current signaling at the microstrip antenna to generate the electromagnetic signaling or by receiving the electromagnetic signaling at the microstrip antenna and converting it to electrical current signaling.