Printed PIFA antenna and method of making the same
AssigneeHon Hai Precision Ind. Co., Ltd.
InventorsHsin Kuo Dai, Lung-Sheng Tai, Hsien-Chu Lin
Life of this patent
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Abstract
A printed PIFA antenna (1) for an electronic device includes a multi-layer substrate, a U-shaped radiating element or rectangular-wave shaped radiating element disposed in the substrate, a ground portion disposed on surfaces of the substrate and a feeder cable including an inner conductor connecting with radiating element and an outer conductor connecting with ground portion. A multi-layer printed technology is introduced into a design of a PIFA antenna, which will achieve a very compact antenna structure.
Claims14
A printed PIFA antenna comprising:
- a first and second substrates stacked in thickness direction;
- a radiating element comprising a first and second radiating traces respectively disposed on upper surfaces of said first and second substrates;
- a connecting trace for connecting said first and second radiating traces;
- a part of a ground portion disposed on the upper surface of the first substrate;
- a shorting trace for shorting said radiating element to the ground portion;
- and
- a feeder cable comprising an inner conductor electrically connecting with the radiating element and an outer shield conductor electrically connecting with the ground portion.
A printed PIFA antenna for an electronic device, comprising:
- a multi-layer dielectric substrate;
- a radiating element being disposed on at least two layers of the substrate;
- a ground portion disposed on at least one surface of the substrate;
- a shorting trace disposed through one layer of the substrate for shorting the radiating element to the ground portion;
- and
- a feeder cable comprising an inner conductor electrically connecting with the radiating element and an outer conductor electrically connecting with the ground portion.
The method of making a printed PIFA antenna for an electronic device comprising the steps of:
- a. choosing a multi-layer dielectric substrate;
- b. determining the length of a radiating element according to predetermined operating frequency and dielectric constant, curving the radiating element to a predetermined shape according to the determined length of theradiating element and then disposing the radiating element on each layer of the substrate;
- c. disposing a ground portion on a surface of the substrate and disposing the radiating element on the layers of the substrate;
- d. providing a shorting trace for shorting the radiating element to the ground portion;
- f. providing a feeder line which comprises an inner conductor and an outer conductor and respectively electrically connecting the inner conductor with radiating element and the outer conductor with the ground portion.
A printed PIFA antenna comprising:
- a multi-layer dielectric substrate defining upper, middle and lower levels vertically;
- a radiation trace and a ground trace located at the upper level;
- another radiation trace located at the middle level;
- another ground trace located at the lower level;
- a side ground trace disposed between the upper and lower levels and connecting the ground trace to the another ground trace;
- a connection trace disposed between the upper and the middle level and connecting the radiation trace to said another radiation trace;
- a short trace disposed between the middle level and the lower level and connecting said another radiation trace to said another ground trace;
- and
- a feeder cable having inner conductor connected to the radiation trace and an outer conductor connected to the ground trace.
Dependencies are inferred from the claim text.