Feature: Communications
T e Pulse W3415 is an example of
a surface-mount embedded antenna suitable for 5G applications, with its coverage from 617MHz to 6GHz, perfect for vehicle telematics applications; see Figure 5. A quarter-wave ceramic monopole
antenna is an excellent example of an embedded antenna. T ese antennas are suitable for a wide variety of devices, being relatively simple to design into the end application. T ere is a big range of antennas
Figure 3: With a VSWR of 1:1, there is no refl ected power
available to suit most applications: 5G, V2X/V2C and GNSS are popular automotive applications. For V2X/V2C systems, the ceramic
patch AVX 9001118 antenna is suitable for the 5.9GHz spectrum. And, stamped metal embedded antennas, such as the omnidirectional AVX 1002298, are becoming popular for the emerging dedicated short-range (DSRC) V2X/V2C applications operating in the 5.8GHz radio spectrum. Multiband GNSS antennas are typically
externally mounted to achieve optimal signal-to-noise ratio. An example is the Abracon AEACBD050018-SG4L2L5, which is IP67-rated and supports all operational GNSS constellations. In the end, each ADAS function has
Figure 4: Popular antenna types
desired transmit and receive link budget. More output power requires more input power to the transmitter, raising power consumption.
Antenna types As shown in Figure 1, there are diff erent types of antennas used in automotive ADAS applications. T ese include external outdoor antennas mounted on the vehicle roof, internally-cabled antennas connected to a device’s main PCB and enclosed within the device, and embedded surface-mount antennas placed on the device PCB; see Figure 4. Embedded antennas are extremely
popular for many compact applications, such as an in-cabin wireless hotspot; see Figure 5 for a common type.
20 November 2021
www.electronicsworld.co.uk
diff erent needs in terms of operating frequency, size constraints and the physical mounting method. 5G, V2X/ V2C and multi-band GNSS are three of the most popular automotive uses, and antennas from a variety of diff erent suppliers can be found on the TTI website.
Figure 5: Pulse W3415 surface-mount embedded antenna for 5G
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46
