Matchstick Antenna Data Sheet

Product Overview

A matchstick antenna dedicated to the TWELITE series.

Main Features

1. Antenna dedicated to TWELITE Twilight and wire antenna types. (Cannot be connected to coaxial connector types.)
2. Can also be used bent. (When standing upright, it exhibits characteristics closer to a dipole.)
3. Environmental consideration: RoHS compliant.

Standard Installation Method

1. To obtain similar radiation characteristics (omnidirectional) in all directions, install the matchstick antenna vertically as shown in the figure.

   

2. When the matchstick antenna is installed horizontally, omnidirectionality cannot be obtained.

   

External Dimensions

1. Outline drawing and dimensions

   

2. MW-A-W0 mounting diagram

   

Mounting Example

• The shape, design, and board thickness of the printed circuit board in <Figures 7~8> are examples and can be changed according to the application. To ensure antenna performance, wiring and electronic components (sensors, switches, etc.) are usually placed on the TWELITE mounting side, and a solid GND and battery holder are placed on the opposite side.
• <Figures 7~8> are perspective views.

  

Specifications

Note 1: The value for radio certification application is based on measurements in all directions and may differ from the maximum value in the directivity chart below.

Directivity

1. Directivity Measurement Method 1 (Standard installation method)

Maximum: -0.8[dB]　Minimum: -1.4[dB]　Average: -1.2[dB]

2. Directivity Measurement Method 2

Maximum: -0.6[dB]　Minimum: -17.4[dB]　Average: -3.8[dB]

Note 3: 0[dB] on the directivity chart corresponds to the gain of a standard dipole antenna.

Note 4: TWELITE mounted on the printed circuit board in <Figures 7~8> (solid GND size 30[mm]×30[mm]) for gain and directivity measurement.

Remarks

1. Gain and directivity vary depending on the solid GND size of the printed circuit board on which TWELITE is mounted, external wiring, battery, and placement of electronic components (sensors, switches).
2. If metal parts or wiring are placed around the MW-A-W0, antenna characteristics may be significantly affected. Examples with relatively small influence include resin, printed circuit boards without wiring (thickness: about 1~1.6[mm], material: FR-4, etc.), and resin screws.
3. When used in a case, a case thickness of about 1.5~2[mm] and materials such as ABS resin or polycarbonate are recommended.
4. It is recommended that the solid GND size of the printed circuit board on which TWELITE is mounted be about 20[mm]×20[mm] to 40[mm]×40[mm].