The phrase "a very compact design" is correct and usable in written English.
It can be used to describe an object or product that has a small and efficient design, often emphasizing space-saving features.
Example: "The new smartphone model features a very compact design, making it easy to carry in your pocket."
Alternatives: "a highly efficient design" or "a space-saving design."
A very compact design is achieved by using a position space principle.
The electron spectrometer (ELS) is a standard top-hat electrostatic analyser in a very compact design.
The presented setup allows a very compact design of the white-light source.
Here, we propose a very compact design for a laser cavity based on all-dielectric metasurface perfect reflectors.
"Our previous work on the metallic flat lens produced a great excitement in regard to the possibility of achieving high numerical aperture and spherical aberration-free focusing with a very compact design.
The resulting construction is distinguished by a very compact design and its fail-safe characteristics in the case of a fault of the high-voltage amplifier.
The very compact design and the absence of the gas flow system make this detector substantially ready for use as focal plane detector for future X-ray space telescopes.
The very compact design and low power consumption (heating power demand between 50 and 150 mW) are achieved by using Gallium as metal propellant with its low melting point of approximately 30 °C.
The importance of such filter is its very compact design which can be used in integrated optical devices.
Using a very compact cavity design and combining techniques of hole burning mode suppression and frequency selection we achieve a smoothly tunable bandwidth of more than 150 GHz.
Results indicate that composite materials can perform well under normal operation and provide some protection against single cell failure; although, for very compact designs, the amount of wax available to absorb heat is reduced and the effectiveness of the phase change material is diminished.
