Millimeter-Wave Antenna-in-Package Feeder With Harmonic Suppression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge in millimeter-wave antenna-in-package technology is the difficulty in implementing harmonic suppression due to high manufacturing process requirements and the narrow radio frequency feeder, which leads to spurious emissions exceeding thresholds.
Innovation Solution
Incorporating a harmonic suppression unit with a transmission part and a bent part between the antenna matching stub and the feeder transmission strap, forming a resonant circuit to suppress harmonics, with a design that reduces manufacturing precision demands and allows for a compact, flexible structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a narrow radio frequency feeder is used in millimeter-wave antenna-in-package, then the occupied space is reduced and transmission efficiency is improved, but the manufacturing process precision requirement increases and harmonic suppression becomes difficult to implement
Solution Approach 1:
The harmonic suppression unit is nested within the existing antenna feeder structure. The bent part and transmission part form a resonant circuit that is integrated into the narrow feeder path, allowing harmonic suppression functionality to be embedded without increasing the overall feeder width or occupying additional space.
Solution Approach 2:
The harmonic suppression is achieved by introducing a bent part that creates a resonant circuit in a different dimensional configuration. The bent part forms an opening structure that establishes a resonant path, allowing the narrow feeder to provide both transmission and harmonic suppression functions through dimensional reconfiguration rather than width increase.
2Loss of energy
If a narrow radio frequency feeder is used in millimeter-wave antenna-in-package, then the transmission efficiency is improved, but the harmonic suppression implementation becomes difficult
Solution Approach 1:
The bent part and transmission part form a resonant circuit that creates a band-stop characteristic curve at harmonic frequencies. This resonant structure mechanically vibrates electromagnetic energy at specific frequencies, suppressing harmonics through resonance rather than requiring complex filtering components that would be difficult to manufacture in a narrow feeder configuration.
Solution Approach 2:
The harmonic suppression is achieved by changing the geometric parameters of the feeder path. The bent part introduces specific length and curvature parameters that determine the resonant frequency, allowing the same narrow feeder structure to suppress different harmonic orders by adjusting these geometric parameters without changing the overall feeder width or complexity.
3Object-generated harmful factors
If a harmonic suppression unit is added to the antenna feeder, then the harmonic suppression effect is achieved, but the device complexity increases
Solution Approach 1:
The harmonic suppression unit is merged with the antenna feeder transmission path. The bent part and transmission part are integrated into the same continuous conductive structure, combining the transmission function and harmonic suppression function into a single unified component rather than separate elements, thereby avoiding additional complexity.
Solution Approach 2:
The narrow radio frequency feeder is designed to serve multiple functions simultaneously: it provides signal transmission, maintains compact size, and suppresses harmonics through the integrated bent part resonant circuit. This multi-functionality reduces the need for separate components and simplifies the overall device structure despite the added harmonic suppression capability.
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 solution effectively suppresses harmonics, improves manufacturability, and enhances mass production of millimeter-wave antenna-in-packages, while maintaining a compact design and strong transmission capability.
Implementation Method 1
The bent part and the transmission part form an opening structure. This is equivalent to serially connecting a resonant circuit between the antenna matching stub and the feeder transmission strap, so that a band-stop characteristic curve may be formed at frequencies needing to be suppressed
Data Source
AI summary
A millimeter-wave antenna-in-package includes a substrate, and a radiation structure and a first antenna feeder that are disposed in the substrate. The first antenna feeder includes an antenna matching stub, a feeder transmission strap, and a first harmonic suppression unit. A first end of the antenna matching stub is connected to the radiation structure. The first harmonic suppression unit includes a first transmission part and a first bent part. A first end of the first bent part is connected to a first end of the first transmission part, and a second end of the first bent part and a second end of the first transmission part form a first opening. A second end of the antenna matching stub is connected to the feeder transmission strap through the first transmission part, and the feeder transmission strap extends along the first reference direction.