Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [pcb-antenna]

It is an anntenna type which is implemeted on a PCB (printed circuit board) by copper traces.

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How does a chip antenna work?

There are many guides to using chip antennas, with and without baluns, PCB layout considerations, etc., but I've been unable to find any information on how chip antennas work at a fundamental level, and how they're manufactured. Can anyone provide…
Daniel Schuler
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What is the purpose of the elements of this antenna?

I have a 5GHz 23dBi Wi-Fi panel antenna which has the geometry shown in the images below. I have been quite curious as to the purpose of this bizarre antenna design. The elements have such unique shapes, and each is slightly different, though…
Sam Gallagher
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Designing a GSM PCB antenna

Before someone complains about my crappy design I should tell you that my knowledge on antennas or RF is near zero. I recently worked on a project that required a GSM module. After testing it on a PCB using an external antenna that apparently seamed…
Bruno Ferreira
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Why can't you put a plane under a trace antenna?

I'm working with RFID for the first time. All the app notes I've read show a separate region of PCB allocated for the trace antenna, with no planes above/below. I want to understand why this is, and if it's strictly necessary. I understand that the…
user2864293
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Need help with selecting an antenna for PCB

I have designed a pair of circuits which utilize the QAM-TX2-433/QAM-RX2-433 transmitter/receiver. So far everything is hooked up on solderless breadboards, with just a length of wire for antennas. The next stage is to design PCBs for these circuits…
Val Blant
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IC on Digikey is 5x more expensive than board containing same IC on Alibaba: How?

I built a prototype using an NFC board I bought from Alibaba for 1$ (https://www.alibaba.com/showroom/rfid-rc522.html). It claims to use the NXP MFRC522 IC, and if I look on the board the chip has that part number and even the little NXP logo. It…
MapleTronix
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PCB Ground Pour, Crosstalk and antennas

I'm trying to understand the effects of polygon pour fills when high speed line transitions might occur. Consider the fabricated case example below: In this example the tracks (colored in light blue) were set as much apart as possible on the left…
Guillermo Prandi
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What are these uniform traces that extend to the board edge?

These Super Famicom cartridge PCBs have what appear to be uniformly-spaced traces extending all the way to the extreme left and top of the board. They don't look castellated (and there are easier ways to make test points besides). The ICs are…
Nicholas
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50Ω Impedance Matching with Signals Through Vias

I'm working on an IoT board and it is all laid out (LTE, GPS, BLE, WIFI - 30mm x 30mm -- VERY TIGHT). As a design concession, I have to use vias to route some of the RF signals. There's no other way to keep the board that small. I've impedance…
Leroy105
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PCB Antenna design for nRF2401

I'm integrating an nRF24L01+ chip into a PCB I'm designing, but I'm a little confused about the best PCB antenna design. In the datasheet for the chip, they specify an antenna like this: However, all of the boards you can buy with this chip use a…
Rocketmagnet
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Can a screw hole in between PCB antenna reduce efficiency significantly?

I am attaching a photo of what I have done. This hole is not suited there, but how much it is going to affect the performance of the antenna?
dharmikP
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How do ZOR antennas work?

In a Dialog application note (AN-B-027), I ran into this rather curious antenna for 2.4GHz operation: This is on two PCB layers connected with vias; the whole thing is shorted together at DC, but forms a sort of labyrinth pattern that switches back…
Alex I
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Placement of RF module for better performance

I am using a standard RF module (i.e., Bluetooth-module-on-PCB), which has a PCB-trace-type anntena. It is in turn to be soldered onto my main PCB. The whole thing will be powered by a standard Li-ion battery. Which of the following two placements…
boardbite
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In Eagle PCB, how can I reuse devices from existing schematics?

I'm making an Eagle PCB schematic design, a break-out board for the TI cc2540. I have a reference Eagle design with a PCB antenna, and I would like to use that antenna. Looking at the element "info" for this printed antenna, it appears to be in…
manuelBetancurt
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How do I calculate a PCB antenna trace width?

I'm totally stuck here trying to find a single source that describes how to determine a PCB antenna trace width. I understand how to determine the length based on the targeted wavelength, but the width is lost on me. To preface, I'm very new to this…
Davbog
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