Every built-in design is an AntennaBuilder whose source is
meant to be read and copied. Address them as family.name (the same names
python -m antennaknobs list prints), and open any in the live
simulator to drag its knobs. Many are modelled
after L. B. Cebik (W4RNL)‘s articles.
Crossed dipoles fed in phase quadrature (turnstile)
dipoles.folded_invvee
Folded inverted-vee — the folded dipole’s impedance step-up, with drooped arms
dipoles.folded_invvee_balun
Folded inverted-V fed through a 4:1 balun and real coax — the Transformer showcase (issue #301)
dipoles.invvee
Inverted-vee dipole — the default quickstart example · variants: classic_edz, dipole, three_halves
dipoles.invvee_catenary
Inverted-vee dipole whose arms hang as real catenaries (issue #698, unit 2)
dipoles.invvee_coax_station
Inverted-V fed through real coax — the classic “resonant antenna on 50 Ω line” station, modelled from the rig (issue #300) · variants: classic_edz, dipole, three_halves
dipoles.koch_dipole
Koch fractal dipole (L. B. Cebik, W4RNL — “fractal antennas”)
dipoles.ocf_dipole
Off-Center-Fed dipole (Windom): a half-wave fed away from the middle (L. B. Cebik, W4RNL)
dipoles.pota_invvee
POTA wire-gauge tradeoff: a 20 m inverted-V where the wire is a knob · variants: classic_edz, dipole, three_halves
dipoles.short_dipole_loaded
Center-loaded shortened dipole — the Load-branch showcase for issue #65
The delta loop is the catalog’s teaching showpiece — one loop laid out four
ways (delta_loop, delta_loop_flyby, delta_loop_reflected,
delta_loop_topdown), all exposing the same knobs (base, length_factor,
angle_deg) and producing byte-identical wires. They differ only in how you
specify the geometry, from writing every corner as coordinates to flying the
whole shape with a Drone — see
Many ways to express geometry.
Design
Notes
loops.bisquare
Bi-square: a two-wavelength loop worked as a vertical broadside curtain (L. B. Cebik, W4RNL)
loops.delta_loop
Corner-fed full-wave delta loop; corner coordinates from a closed-form expression for the top corner · variants: z100, z200
loops.delta_loop_flyby
The shipped delta loop, laid down as a full drone flyby — fly the whole perimeter and let the flight do the work, no coordinates written
loops.delta_loop_reflected
The shipped delta loop, built as a reflection hybrid: the drone is a trig-free point finder, an ry mirror gives the left half for free, and build_path stitches the corners
loops.delta_loop_slanted
Delta loop tilted out of the vertical plane by a slant_deg knob · variants: slant0, slant30
loops.delta_loop_topdown
The shipped delta loop, built as a top-down reflection flight: the same reflection hybrid as delta_loop_reflected, but the flight starts at the top — so the top height is right from move one and there is no z-offset pass
loops.diamond_loop
Full-wave diamond (square) loop fed at the bottom corner · variants: z100, z200
loops.diamond_loop_turnstile
Two diamond loops crossed and fed in phase quadrature (turnstile)
loops.horizontal_loop
Horizontal full-wave loop / “loop skywire” (L. B. Cebik, W4RNL)
loops.horizontal_loop_drone
A horizontal square loop, vertex-fed, authored with the 3D-turtle Drone
loops.inv_delta_loop
Inverted delta loop — the triangle flipped so the feed edge sits at the top · variants: z100, z200
loops.quad
Two-element cubical quad beam (L. B. Cebik, W4RNL)
loops.skyloop_lmatch
80 m triangular skyloop run on 17 m, matched to 50 Ω with an L-network — the Shunt-branch showcase for issue #65 (Q2, shunt-to-common) · variants: band_locked
loops.triangular_skyloop
Triangular horizontal full-wave loop (“skyloop”), fed at a corner · variants: band_locked
Bobtail curtain: a 3-element vertically-polarised broadside array (L. B. Cebik, W4RNL)
verticals.bruce
Bruce array: a series-fed vertically-polarised curtain (L. B. Cebik, W4RNL)
verticals.challenger
KJ6ER’s “Challenger” — off-center-fed halfwave vertical with 4:1 unun · variants: band10, band12, band17, band20, band6, plus
verticals.dominator
KJ6ER’s “Dominator” — end-fed halfwave vertical with 49:1 transformer · variants: band10, band12, band17, plus
verticals.elt_whip
Parametric rebuild of the ELT whip on a 96-inch rounded ground-plane grid — the heavier of the two classic NEC performance benchmarks (whip_antenna_8ft_groundplane.nec from the W8IO NEC benchmarks page, http://www.w8io.com/nec-benchmarks.htm): 434 deck wires, ~4,400 segments · variants: coarse
verticals.four_square
Four-square phased vertical array — the diagonal-firing quadrature box (L. B. Cebik, W4RNL)
verticals.half_square
Half-square: a vertically-polarised wire antenna (L. B. Cebik, W4RNL)
verticals.inverted_l
Inverted-L: a bent, top-loaded vertical (L. B. Cebik, W4RNL)
verticals.inverted_l_tmatch
10 m inverted-L worked on the 12 m band through a T-network tuner — the first design with a pure interior circuit node (series C, shunt L, series C), exercising the MNA network core on the classic “wire antenna + T-match” situation
verticals.jpole
J-pole: an end-fed half-wave matched by a quarter-wave stub (L. B. Cebik, W4RNL)
verticals.phased_verticals
Two-element phased vertical array — the 90-degree cardioid (L. B. Cebik, W4RNL)
Center-fed doublet on open-wire line into a genuinely balanced tuner — the FloatingBalun showcase (issue #589)
wire.doublet_ladder_tuner
88 ft doublet + 100 ft of 600 Ω open-wire line + lossy T-network tuner — the “non-resonant wire and a matchbox” station, modelled from the rig (issue #300) · variants: classic_edz, dipole, three_halves
wire.edz
Extended Double Zepp: 1.25 wl centre-fed doublet + series match (L. B. Cebik, W4RNL)
wire.efhw_sloper
End-fed half-wave sloper with a real 49:1 unun — “the POTA antenna, complete” (issue #329) · variants: band40
wire.expanded_lazy_h
Expanded Lazy-H: two stacked EDZs fed through a real phasing harness (L. B. Cebik, W4RNL)
wire.lazy_h
Lazy-H: two stacked collinear elements fed in phase (L. B. Cebik, W4RNL)
wire.longwire
Resonant multi-wavelength long-wire (L. B. Cebik, W4RNL)
wire.rhombic
Terminated rhombic: a traveling-wave directional long-wire (L. B. Cebik, W4RNL, “Long-Wire Antennas” / “The Terminated Vee-Beam and Rhombic”)
wire.sterba
Sterba curtain: a broadside, bidirectional, horizontally-polarised curtain array (E. J. Sterba, Bell Labs, 1930s)
wire.sterba_bl
Sterba curtain whose interior risers are ideal balanced line, not wire (momwire-only)
wire.sterba_tl
Sterba curtain, transmission-line sister design of sterba.py
wire.terminated_longwire
Terminated end-fed long-wire: the directional single wire (L. B. Cebik, W4RNL, “Long-Wire Antennas”, Part 2)
wire.vbeam
Resonant V-beam: two long wires splayed into a V (L. B. Cebik, W4RNL)
wire.w8jk
W8JK flat-top beam: a 2-element all-driven 180-degree array (L. B. Cebik, W4RNL, after John Kraus W8JK)
wire.zepp
End-fed half-wave “Zepp” with a tuned-stub feeder (L. B. Cebik, W4RNL)
Fan dipole — parallel dipoles off one feed for several bands · variants: five_band, pair_12_10, pair_17_15
multiband.hexbeam_5band
Stacked hexbeam: up to 5 concentric hexbeam shapes stacked along z, each sized to its own band’s wavelength, sharing one common feed by default (band 0 driven, the rest coupled up the stack — see the feed-mode note below) · variants: opt, opt_coupled
multiband.trap_dipole
Dual-band trap dipole — Load(parallel=True) showcase for issue #65
multiband.trap_fan_dipole
Four-band trapped fan dipole — combines fandipole geometry with the trap_dipole Load(parallel=True) idiom · variants: band0_full, band0_inner, band1_full, band1_inner
multiband.twoband_fan_dipole
Two-band fan (parallel) dipole — two dipoles bonded at a common feed · variants: current_physical, s01, s015, s01_eps001, s02, s025, s03, s05, s07