Circuit board and SMD antenna for this
AssigneeKoninklijke Philips Electronics N.V.
InventorHilgers Achim
Life of this patent
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Abstract
A printed circuit board (4) is described for surface mounting of electrical and/or electronic components, in particular an SMD (surface mounted device) antenna with a ceramic substrate (1) and at least one resonant track structure (20; 30), and such an antenna for single and multiband applications, in particular in the high-frequency and microwave range. Since one end of the track structure (20) of the antenna is connected to the ground metallization (41), a relatively large bandwidth is achieved with small dimensions of the antenna plus the possibility of smaller board design.
Claims12
A printed circuit board including a surface mounted device antenna with at least one resonant conductor track structure, the printed circuit board comprising a ground metallization configured to substantially surround the antenna, and to connect to one end of the conductor track structure,
- the antenna comprising:
- a first supply lead configured to connect one end of a first resonant track structure of the antenna to a ground potential;
- a second supply lead configured to couple an electromagnetic wave to be emitted into the antenna, which first track structure has a plurality of conductor sections, while the length of the conductor track structure is dimensioned so as to excite a desired first resonant frequency, and paths of the conductor sections and spacings between the conductor sections are configured to excite a first harmonic of the first resonant frequency;
- and
- a second resonant track structure, one end of which is connected to the second supply lead and the length of which is configured dimensionally to excite at least one of a desired second resonant frequency and a harmonic of the second resonant frequency.
A printed circuit board including a surface mounted device antenna with at least one resonant conductor track structure, the printed circuit board comprising a ground metallization configured to substantially surround the antenna, and to connect to one end of the conductor track structure, the antenna comprising:
- a first supply lead configured to connect one end of a first resonant track structure of the antenna to a ground potential;
- and
- a second supply lead configured to couple an electromagnetic wave to be emitted into the antenna, which first track structure has a plurality of conductor sections, while the length of the conductor track structure is dimensioned so as to excite a desired first resonant frequency, and paths of the conductor sections and spacings between the conductor sections are configured to excite a first harmonic of the first resonant frequency, wherein at least one of the first and second track structure has conductor sections of different widths.
A printed circuit board comprising:
- a surface mounted antenna;
- and
- a ground metallization configured to substantially surround said antenna;
- wherein said antenna comprises:
- a first resonant structure having one end connected to said ground metallization, and another end connected to a supply lead configured to couple an electromagnetic wave to be emitted into the antenna;
- and
- a second resonant structure having an end connected to the supply lead;
- wherein a length of said first resonant structure is configured dimensionally to excite a desired first resonant frequency;
- and
- wherein a length of said second resonant structure is configured dimensionally to excite at least one of a desired second resonant frequency and a harmonic of the second resonant frequency.
Dependencies are inferred from the claim text.