X-Authentication-Warning: delorie.com: mail set sender to geda-help-bounces using -f X-Recipient: geda-help AT delorie DOT com X-Virus-Scanned: Debian amavisd-new at smtp-vp01.sig.oregonstate.edu From: "Roger Traylor (traylor AT engr DOT orst DOT edu) [via geda-help AT delorie DOT com]" Content-Type: multipart/alternative; boundary="Apple-Mail=_54C0BE61-EF75-4BDE-B02A-1F998AB45754" Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.6\)) Subject: Re: [geda-help] Linux - PCB Meander Antenna Date: Wed, 2 Sep 2020 15:45:58 -0700 References: <20200829221451 DOT GA2565 AT newvzh DOT lokolhoz> <664de6c2-ad96-8298-1b64-ad550acfca64 AT k4gvo DOT com> <20200901193434 DOT GB19839 AT newvzh DOT lokolhoz> <20200902141116 DOT GA2911 AT newvzh DOT lokolhoz> <20200902165424 DOT GB2911 AT newvzh DOT lokolhoz> <333FD0E9-238C-445F-AEE4-850B0EA19A88 AT ece DOT orst DOT edu> <2A687A4D-3219-431E-8866-2D11C2418C81 AT noqsi DOT com> To: geda-help AT delorie DOT com In-Reply-To: Message-Id: X-Mailer: Apple Mail (2.3445.9.6) Reply-To: geda-help AT delorie DOT com Errors-To: nobody AT delorie DOT com X-Mailing-List: geda-help AT delorie DOT com X-Unsubscribes-To: listserv AT delorie DOT com Precedence: bulk --Apple-Mail=_54C0BE61-EF75-4BDE-B02A-1F998AB45754 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Gang, A quick question for PCB gurus: I have a =E2=80=9Cfolded F=E2=80=9D antenna for 2.4Ghz. It has one open = end, one input for the signal and one matching stub that is to be connected to ground. I drew this in PCB as a series of =E2=80=9Cpads=E2=80=9D. I attempted to = make one pad =E2=80=9C1=E2=80=9D the input, and pad =E2=80=9C2=E2=80=9D as ground. gschem did not complain about = the symbol, but PCB complains=20 about not being able to find pad "2" (the ground pin).=20 Could this be because PCB sees all the pads overlapping as one pad? If = so, how can I overcome this problem? Thanks, Roger Traylor Footprint file is below: Element[0x00000000 "" "" "" 0 0 0 0 0 100 0x00000000] #Flipped Meander antenna for CC2500 =20 #R. Traylor 7.27.2020 #50 ohm feed point is at end of segment 10 #requires via to ground plane at bottom of segment 11 #silk at bottom marks the edge of the ground plane #see TI/Chipcon Application Note AN043 #This is the flipped version of the original meander antenna # ( # X1 Y1 X2 Y2 thick clear mask name = numb flag # right side from origin Pad[ 0 0 8661 0 1969 0 10000 "1" = "1" 0x00000100] #segment 0 Pad[ 8661 0 8661 -10394 1969 0 10000 "1" = "1" 0x00000100] #segment 1 Pad[ 8661 -10394 18504 -10394 1969 0 10000 "1" = "1" 0x00000100] #segment 2 Pad[ 18504 -10394 18504 0 1969 0 10000 "1" = "1" 0x00000100] #segment 3 Pad[ 18504 0 27165 0 1969 0 10000 "1" = "1" 0x00000100] #segment 4 Pad[ 27165 0 27165 -15512 1969 0 10000 "1" = "1" 0x00000100] #segment 5 # left side from origin =20 Pad[ 0 0 0 -10394 1969 0 10000 "1" = "1" 0x00000100] #segment 6 Pad[ 0 -10394 -9843 -10394 1969 0 10000 "1" = "1" 0x00000100] #segment 7 Pad[-9843 -10394 -9843 0 1969 0 10000 "1" = "1" 0x00000100] #segment 8 Pad[-9843 0 -27559 0 1969 0 10000 "1" = "1" 0x00000100] #segment 9 Pad[-18504 -787 -18504 -19281 1969 0 10000 "1" = "1" 0x00000100] #segment 10 Pad[-26772 -787 -26772 -18504 3543 0 10000 "2" = "2" 0x00000100] #segment 11 #silk lines ElementLine[-30197 2559 29725 2559 700] #top ElementLine[ 29725 2559 29725 -18307 700] #right ElementLine[-30118 2559 -30118 -18307 700] #left ElementLine[-30118 -18307 -29724 -18307 700] #bottom starting = from left ElementLine[-23798 -18307 -20678 -18307 700] #segment between = vertical pieces ElementLine[-16318 -18307 29564 -18307 700] #right-most = segement ) # antenna layout # # * =3D origin # -------s9-- *--s0--- ----s4--| # | | | | | | | # | | s8 s6 s1 s3 | # | | | | | | s5 # s11 | |---s7---| |---s2--- | # | | | # | s10 | # | | | # | | # --Apple-Mail=_54C0BE61-EF75-4BDE-B02A-1F998AB45754 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8 Gang,

A quick question for PCB = gurus:

I have = a =E2=80=9Cfolded F=E2=80=9D antenna for 2.4Ghz. It has one open = end, one input for the signal

and one matching stub = that is to be connected to ground.

I drew this in PCB as a series of = =E2=80=9Cpads=E2=80=9D. I attempted to make one pad =E2=80=9C1=E2=80=9D = the input,

and pad =E2=80=9C2=E2=80=9D as = ground. gschem did not complain about the symbol, but PCB = complains

about not being able to find pad = "2" (the ground pin).

Could this be because PCB sees all the pads overlapping as = one pad? If so, how can

I overcome this = problem?

Thanks,

Roger Traylor

Footprint file is = below:

Element[0x00000000 "" "" "" 0 0 0 0 0 100 = 0x00000000]

#Flipped Meander antenna for = CC2500

#R. Traylor = 7.27.2020

#50 ohm feed point is at end of = segment 10

#requires via to ground plane at = bottom of segment 11

#silk at bottom marks the edge of = the ground plane

#see TI/Chipcon Application Note = AN043

#This is the flipped version of = the original meander antenna

#

(

# = X1 Y1 X2 = Y2 thick clear mask name = numb flag

# right side from = origin

Pad[ = 0 0 8661 = 0 1969 0 10000 "1" = "1" 0x00000100] #segment 0

= Pad[ 8661 0 8661 = -10394 1969 0 10000 "1" "1" = 0x00000100] #segment 1

= Pad[ 8661 -10394 18504 -10394 = 1969 0 10000 "1" "1" 0x00000100] = #segment 2

Pad[ = 18504 -10394 18504 0 1969 = 0 10000 "1" "1" 0x00000100] = #segment 3

Pad[ = 18504 0 27165 0 = 1969 0 10000 "1" "1" 0x00000100] = #segment 4

Pad[ = 27165 0 27165 -15512 1969 = 0 10000 "1" "1" 0x00000100] = #segment 5

# left side from origin = =

Pad[ 0 = 0 0 -10394 1969 = 0 10000 "1" "1" 0x00000100] #segment = 6

Pad[ 0 = -10394 -9843 -10394 1969 0 = 10000 "1" "1" 0x00000100] #segment 7

Pad[-9843 -10394 = -9843 0 1969 0 = 10000 "1" "1" 0x00000100] #segment = 8

Pad[-9843 = 0 -27559 0 1969 = 0 10000 "1" "1" 0x00000100] #segment = 9

Pad[-18504 = -787 -18504 -19281 1969 0 10000 = "1" "1" 0x00000100] #segment 10

Pad[-26772 -787 = -26772 -18504 3543 0 10000 "2" = "2" 0x00000100] #segment 11

#silk = lines

ElementLine[-30197 = 2559 29725 2559 700] = #top

ElementLine[ 29725 = 2559 29725 -18307 700] = #right

ElementLine[-30118 = 2559 -30118 -18307 700] = #left

ElementLine[-30118 = -18307 -29724 -18307 700] #bottom = starting from left

ElementLine[-23798 = -18307 -20678 -18307 700] #segment = between vertical pieces

ElementLine[-16318 = -18307 29564 -18307 700] = #right-most segement

)

# = antenna layout

#

# * =3D = origin

# -------s9-- = *--s0--- = ----s4--|

# | | = | | | = | |

# | = | s8 s6 s1 = s3 |

# | = | | | = | | s5

# = s11 | |---s7---| = |---s2--- |

# | = | = = |

# | s10 = = |

# = | | = = |

# | = |

#

= --Apple-Mail=_54C0BE61-EF75-4BDE-B02A-1F998AB45754--